Ultra Compact Gear Reduction Unit

[rc4wd]

http://www.tracgear.com/product/rc4wd/temp/1x.jpg

Above is our the final prototype version. We will start production after we go through a few more testing.

The gear ratio is 4.3:1. This custom housing can be expanded all the way to 200:1 gear ratio if needed. Any other other gear ratio will be made base on request.

A picture with it mounted a 540 motor will be posted tomorrow.

Now we have gained a lots of experience in making micro size gears, we will start designing a 3 or 4 speed full metal tranmission. A prototype will be made end of next month.

The retail price will be 39.99 per unit. You will get the Ultra Compact GRU and a custom pinion gear for the motor.

Specs:

Overall diameter: 47mm
Height: 18mm
Output shaft diameter: 3mm (with a flat surface for mouting standard RC pinion gears)
Total gears: 4

[Gula]

what are the gears made of?

[rc4wd]

hardened steel, housing is 6061 alum.

[TLTCrawlin]

Looks sweet!

[rockwerks]

Specs:

Overall diameter: 47mm
Height: 18mm
Output shaft diameter: 3mm (with a flat surface for mouting standard RC pinion gears)
Total gears: 4

3mm shaft? not 3.17mm or stock 1/8" 540?

[beatnbruised]

Those look pretty nice. Send me a set, and Ill Test them for you, and do a review.:lol:

[rc4wd]

It is standard 3.17mm (1/8") output shaft.

[rockwerks]

It is standard 3.17mm (1/8") output shaft.

very good!

I will want one for a new super class project.

LMK if you need testers and or when they are available. nice work!

[run2jeepn]

Damnit I need one for my rig. Get those bad boys made.

[jason]

Wow those look really cool!

[Cole82]

I can't wait to test this new product out for evey one.
What size pinion do I need. Also what pitch is it?

[rockwerks]

I can't wait to test this new product out for evey one.
What size pinion do I need. Also what pitch is it?

Read the thread oh mighty tester.............it comes with a custom pinion :roll: :flipoff:

[Cole82]

Sorry I just learned how to read last week.:flipoff:
Speak N Spell really is helping me out.;-)

[ColquittCustom405]

You guys are stepping up your game! Nice products man!

[roadblock]

yeah this looks to badass, and the tranny u speak of for next month has my mouth waterin

[slobin3d]

I would like to test this. I have a scale 2.2 build coming up here soon and i dont have room for a pede or similar tranny if this could be stacked to get a ratio so that it could run drirect drive it would be perfect

[rc4wd]

We already have a tester person selected a few days ago.

Making those gears will take a few weeks, we expect to ship 2nd week of next month.

[xjman]

Ok, now if I'm not mistaken you can bolt up motor right to that, then that will bolt to where the motor would have bolted into the tranny? If so, I will pick one up as soon as they are available. My tlt may need some more grunt.

[LIKES2CRAWL]

I need one of these BAD! Where do I sing up for one?:twisted:

[rc4wd]

http://www.tracgear.com/product/rc4wd/custom/gru/v1/1.jpghttp://www.tracgear.com/product/rc4wd/custom/gru/v1/2.jpg

Here is the final specs


Gear reduction ratio: 2.9:1
Overall diameter: 46mm

Height: 18mm

Output shaft diameter: 3.17mm (with a flat surface for mouting standard RC pinion gears)

Total metal gears: 5
Total Parts: 10
We might release other gear ratio down the road, but the GRU unit will be taller. This is the most compact one that we can do for now.

We expect to ship mid October. The prototype will be shipped to the tester on Monday.

[Rckcrwlr]

Count me in on one...My SW2 project will be starting right about the ETA.

Thanks,
John

[run2jeepn]

I really need one of those. I'm running a Stealth with a 65t with Revo shafts. I'm maxxed out on the Spur and Pinion already. I would like something like that. I don't have the room for a GD600. That would work perfect.

[dittohead]

Very cool idea. I will have to get one for my 14'r project8)

[LIKES2CRAWL]

http://www.tracgear.com/product/rc4wd/custom/gru/v1/1.jpghttp://www.tracgear.com/product/rc4wd/custom/gru/v1/2.jpg

Here is the final specs


Gear reduction ratio: 2.9:1
Overall diameter: 46mm

Height: 18mm

Output shaft diameter: 3.17mm (with a flat surface for mouting standard RC pinion gears)

Total metal gears: 5
Total Parts: 10
We might release other gear ratio down the road, but the GRU unit will be taller. This is the most compact one that we can do for now.

We expect to ship mid October. The prototype will be shipped to the tester on Monday.
So the gear ratio went from 4.3:1 to 2.9:1?:roll: Oh well I still need one.;-)

[Gula]

Some company or seller sold something very similar on ebay but it was a 2 speed tranny which would have lowered your first gear and second would be normal 1:1, later they modified it to be a GRU and sold it for the same price $70 or somewhat in that area. This design looks exactly like it but theirs was anodized in gold or bronze

[1BadJeepBruiser]

This will be good for us guys with Bruisers who use pede transmissions.

-Mike

[rc4wd]

GulaVW69, yes. I actually have all the pics of that one still, including their instructions. But I remember I was told it wasn't really designed for a truck, it was more for a street rc cars.

1badjeepbruiser, Mike. Glad that you posted. Send me an email on Monday, I got a new bruiser motor that I want you to test out.

[Thundermaxx]

Yeah that would be sweet for my Bruiser with Engle trans in it. I'm at 66:1 now and that would put me well over 100:1. CREEPY CRAWLER is all I can say.

[Mnster]

I can help put it through hell, 1/6 crawler truck with Hacker Brushless running jumbo kong tires.:-P

If you ever come out with a new 750 motor for the original bruiser 3 speed trans, let me know as I need one.

[rc4wd]

Mnster, wow that does sounds like hell.

It is very hard to find RS-750SH motor, the same one that bruiser uses. I contacted Mabuchi directly, they said I need to order 10,000 pieces for the first order.

I did found some RS-755SH, it is the same, the only problem is that motor is a little bit longer than the RS-750SH motor. I dont think that will be good for everybody, but some people might be able to use it. We expect to get the gear machined by next week, then they will be fitted onto the RS755SH.

I will post pictures as soon as possible.

[Mnster]

Very cool, my original brass pinion is sharp and ready to eat my spur gear. I've been looking into replacement pinion/motor options. Will your pinions have set screws similar to the old pinions that Engle used to make? Just thinking as so you can market them to different consumers. The people that just want a pinion to save their spur and the people that want a motor combo.

My motor is weak, if I ride it hard enough smoke comes rolling out.:lol:

What I would really like to see though is a adaptor plate to convert the motor to 550. Maybe something similar to your planitary unit that bolts up to the mount of the bruiser.

[rc4wd]

Mnster, wow you are right on track.

Actually we decide this morning to give up the 755 conversion idea. If you have the print out from Mabuchi, 750 and 755 has some other differences.

Since we cant find 750, we decided to do a convert, so people can use standard 540 motor.

We expect to have the prototype done by Monday, let me know if you are interested to test it out. Yes, you can keep it too.

Basically we will make a special pinion gear with a grub screw and an adaptor.

Production can take a few days, probably end of next week or the week after.

[1BadJeepBruiser]

Mnster, wow you are right on track.

Actually we decide this morning to give up the 755 conversion idea. If you have the print out from Mabuchi, 750 and 755 has some other differences.

Since we cant find 750, we decided to do a convert, so people can use standard 540 motor.

We expect to have the prototype done by Monday, let me know if you are interested to test it out. Yes, you can keep it too.

Basically we will make a special pinion gear with a grub screw and an adaptor.

Production can take a few days, probably end of next week or the week after.

THis is the best idea yet, fawk the 750 motor, itll be awesome to use a nice 55 turn lathe or something. ONLY ISSUE is youll have to make up a custom mount to hold the motor, you know the one that its on the front cross member ;-) Dont forget about that8)

Mike

[rc4wd]

Yes, it is a custom mount.

At first I spend a whole week searching for that 750 motor and nobody has it.

And at the end making a mount is actually fairly easy, that's why we can get it done this weekend. I expect to post a picture on Monday.

Also all gears that we are releasing from now on will be heat treaded, so it will be extra hard.

Yes, there will be two screws holding the mount and two screws holding the motor. Then there is the custom made extra long pinion gear. We assume all 540 motor has the short shaft.

[1BadJeepBruiser]

Yes, it is a custom mount.

At first I spend a whole week searching for that 750 motor and nobody has it.

And at the end making a mount is actually fairly easy, that's why we can get it done this weekend. I expect to post a picture on Monday.

Also all gears that we are releasing from now on will be heat treaded, so it will be extra hard.

Yes, there will be two screws holding the mount and two screws holding the motor. Then there is the custom made extra long pinion gear. We assume all 540 motor has the short shaft.

SOunds pretty damn good to me

Since we are on the topic of Bruiser transmissions, If I sent you a Kyosho counter gear, which is an exact replacement for the Bruiser slipper spur gear, do you think this something you could make??? The slipper gear is a common issue in those transmissions.

-Mike

[rc4wd]

I just turn in my precious bruiser tranny to our new CAD guy, he will work on it this weekend, I think we can replace most of those gears faily easily.

No need to send me the Kyosho one.

Talking about gears, we have a lots of new gears coming out next week, the 6T 32P, 9T 48P. We are working on TLT-1 locker gears too, but that's scheduled to be out in mid next month.

[1BadJeepBruiser]

I just turn in my precious bruiser tranny to our new CAD guy, he will work on it this weekend, I think we can replace most of those gears faily easily.

No need to send me the Kyosho one.

Talking about gears, we have a lots of new gears coming out next week, the 6T 32P, 9T 48P. We are working on TLT-1 locker gears too, but that's scheduled to be out in mid next month.

Very cool, Looking forward to the new parts

BTW did you get my email on wed about the wheels?

-Mike

[rc4wd]

We got those 2.2 wheel in stock again, but we ship until Monday. We need sometime to count the screws. Email me if I forget. :)

[1BadJeepBruiser]

We got those 2.2 wheel in stock again, but we ship until Monday. We need sometime to count the screws. Email me if I forget. :)

Thank you much Hua, just remember, its 2 sets of 4, enough to do 2 trucks 8)

Mike

[Mnster]

Yes, it is a custom mount.

At first I spend a whole week searching for that 750 motor and nobody has it.

And at the end making a mount is actually fairly easy, that's why we can get it done this weekend. I expect to post a picture on Monday.

Also all gears that we are releasing from now on will be heat treaded, so it will be extra hard.

Yes, there will be two screws holding the mount and two screws holding the motor. Then there is the custom made extra long pinion gear. We assume all 540 motor has the short shaft.


Any chance of it also containing a reduction unit? As you know 2nd and 3rd gear are useless to us crawler folks. Or even scale folks that don't want their ride out of control. If there was a reduction say 2:1 the bruiser would have the shift points about where we need it. I would gladly test and review the adaptor.

I guess you could bolt your current 550 reduction box up the adaptor plate provided the motor/trans mount provides proper clearance.

[rc4wd]

The production of the final Compact GRU will be 4:1, so it might be too much.

And I never even thought about stacking them up together. So I dont know if it will work. I will give a try once it's done on Monday.

It cost a lot to make a GRU housing and custom gears, right now I dont think the market is large enough, consider how many bruiser are out there.

We are working on a mini size transmission, smaller size of the R1. I hope some of you guys will adapt to that instead.

[Mnster]

If you could some how carry that new Tamiya F-350 3-speed trans it would be great. I'm thinking it would not be very hard to bolt to a Bruiser. Maybe create a mount kit.

I don't like the scale hobbies or the Engle trans. The gears hang out the bottom of the truck. :roll:

A part that needs to be made for TLT's is the rear axle lock out axle shafts. It would solve the need to lock out the knuckles. It would stop the C hubs from breaking at the rear axle. Comp rig or scaler our rear axles are locked out.

[rc4wd]

We use to be able to get Tamiya parts, but it's getting harder now days. Maybe Darren from Thundertech Racing can get that, if there is a huge demand. He has a lots of clod parts from Tamiya.

Making a mounting kit wont be too hard. I cant wait to get that truck my self too.

[1BadJeepBruiser]

A part that needs to be made for TLT's is the rear axle lock out axle shafts. It would solve the need to lock out the knuckles. It would stop the C hubs from breaking at the rear axle. Comp rig or scaler our rear axles are locked out.

A straight axle would be b!tching for sure! It would give it a much cleaner look for us scale guys, you could actually cut the arm off and clean up the back of the trucks a whole lot. I know some guys are flipping them to the inside but a straight axle would be sweet and alot stronger

o and a CVD for the front, I want to ask Darran @ TTR about that when I go to the NRCTPA Worlds in the up coming weeks, I know he has MIP make them for the clod, I dont see why they cant be made for the tlt.

Mike

[kaaina]

Will these units be able to handle a super crawler (i.e. TXT)? I am looking for an alteranative to the gd600 ;-) and keep the good products flowing :)

[Mnster]

They should be able to. As you know Cole82 is testing the unit in his TLT, if he doesn't succeed in blowing it to bits. He said we might then put it into Soya's 1/6 brushless truck for further testing.:lol:
http://www.rccrawler.com/forum/showpost.php?p=412582&postcount=37
If it doesn't break after our tests it won't break, ever.;-)

[kaaina]

please keep us posted as to the durability ;-)

[rc4wd]

I am ready to send the first sample today and I have another sample by end of this week.

Just some info, all of those those gears inside are heat treated, so they are very strong.

[roktoy]

Looking forward to seeing how well this setup works.
Jay

[rc4wd]

Jay (roktoy), please send me your address to rcrock(at)gmail.com, thanks

[rc4wd]

http://www.tracgear.com/product/rc4wd/custom/gru/v1/3.jpg

this is the last prototype we made, gears and housing is already in production. We expect to ship the first patch as early as mid next week.

The final gear ratio is 4:1, we were able to improve it after some design change.

[Numbchux]

any chance you guys could make something like this for a 130 XMods motor? I really want to find a way to make my xmods truck into a crawler, but the gearing is the limitation. if you could make a tiny one of these (wouldn't have to hold up to nearly as much torque), that would be the solution!!

not sure how much demand there would be for them though....probably not much

[LIKES2CRAWL]

http://www.tracgear.com/product/rc4wd/custom/gru/v1/3.jpg

this is the last prototype we made, gears and housing is already in production. We expect to ship the first patch as early as mid next week.

The final gear ratio is 4:1, we were able to improve it after some design change.

So these will be 4:1 now? I already prepaid for mine, so it dosn't matter what the site said they will be 4:1 and not 2.?:1, Good cause 4:1 works better for me.

[rc4wd]

Numbchux, where can I get that motor?

LIKES2CRAWL, yes the production version will be 4:1 instead. We were able to to improve the design last minute.

[LIKES2CRAWL]

:twisted: SWEET :twisted:

[xjman]

RC4WD, I am assuming it will hook right to a pede tranny? Also, I dont remember seeing the weight for it?

[rc4wd]

Since the OD is the same as a 540 motor, it is designed to fit any tranny or axle.

We will update the weight once the production version comes out.

[Numbchux]

Numbchux, where can I get that motor?

RadioShack carries the XMods. there's a direct replacement motor upgrade kit that you can buy for ~$10 IIRC.

if you're serious about making one, however, I've got a bunch of extra stock motors, I'd be more than happy to send you one.

or you can buy the stock motors here: http://www.atomicmods.com/ProductInfo.aspx?productid=10149

[run2jeepn]

I'm really wanting to try this thing out on my Stealth tranny. I need lower gears. I'm running a 65t with 85/15..Would that make it way to slow?

[rockwerks]

I'm really wanting to try this thing out on my Stealth tranny. I need lower gears. I'm running a 65t with 85/15..Would that make it way to slow? probably very little wheel speed. id drop down to a 45T if you use one. and up a few teeth on the pinion

[LIKES2CRAWL]

I'm really wanting to try this thing out on my Stealth tranny. I need lower gears. I'm running a 65t with 85/15..Would that make it way to slow?
Is 144.53:1 to slow for you.:shock: :lol: Yea I'd say go brushless and mess with your pinion/spur combo.

[roktoy]

Hua......is the diameter really 46mm?

Jay

[rc4wd]

That was a typo, it is 36mm, same as any 540 motor.

[roktoy]

That was a typo, it is 36mm, same as any 540 motor.

Nice...that's what I figured.
Jay

[kaaina]

Any updates yet :?:

[RCCasper]

Lets see them on a set of clod axles, I would like to know if they will clear the four link setup...

[kaaina]

Lets see them on a set of clod axles, I would like to know if they will clear the four link setup...
i think your better off with their other g/r ;-)

[Numbchux]

any news on the XMod possibility?

I'd also like to know how far apart the 2 mounting holes are.

[rc4wd]

Numbchux, Making one for XMod wont be a problem, just right now we probably wont be able to look at it. Send us an email maybe after we start shipping the 540 version.

kaaina, we still on target to ship mid next week. On our site we post we will ship mid or late October. We are ahead of schedule.

RCCasper, it should works for clod. Thundertech Racing use to make external gear reduction for clod before, our width is about the same.

[kaaina]

thanx you guys are the best ;-)

[kerrywittig]

Newbie question............is this for crawlers with motor on each axle (clod, I think) or for shafty, TXT-!, type crawlers?

[LIKES2CRAWL]

Newbie question............is this for crawlers with motor on each axle (clod, I think) or for shafty, TXT-!, type crawlers?
It can be use anywhere a reg motor works as long as there is enough room for the little extra length.

[kerrywittig]

It can be use anywhere a reg motor works as long as there is enough room for the little extra length.

Thanks for the reply......

TXT-1 is a shafty.....Correct?

[LIKES2CRAWL]

Thanks for the reply......

TXT-1 is a shafty.....Correct?
TXT-1 is a Dual motor shfty version of the Clod wich has dual motor's on the axles and the TLT-1 is the mini version of the TXT-1 kinda.

[kerrywittig]

TXT-1 is a Dual motor shfty version of the Clod wich has dual motor's on the axles and the TLT-1 is the mini version of the TXT-1 kinda.

So you need 2 transmissions (Stampede???) ...

Is there a driveshaft driven RC that uses 1 motor, like a "real" vehicle?

[LIKES2CRAWL]

So you need 2 transmissions (Stampede???) ...

Is there a driveshaft driven RC that uses 1 motor, like a "real" vehicle?
No.....If you use this GRU or a GD600 in a TXT trany you can run 1 motor, I'm just saying that it comes with 2 motors stock.

[kerrywittig]

No.....If you use this GRU or a GD600 in a TXT trany you can run 1 motor, I'm just saying that it comes with 2 motors stock.

What is a GRU, GD600?........See this is where the terminology and parts #'s get me lost!!! I can build real world and know the parts and manufacturers .......but this is a whole new enviroment RC............

[rc4wd]

GRU = Gear Reduction Unit

[LIKES2CRAWL]

What is a GRU, GD600?........See this is where the terminology and parts #'s get me lost!!! I can build real world and know the parts and manufacturers .......but this is a whole new enviroment RC............
GRU is Gear reduction unit, GD600 is a Great Planes product that is also a GRU.

[kerrywittig]

GRU is Gear reduction unit, GD600 is a Great Planes product that is also a GRU.

DOH............................................... ...Thanks for your patience!!

[rc4wd]

Latest update, we expect to ship as early as tomorrow...

[LIKES2CRAWL]

Latest update, we expect to ship as early as tomorrow...
Really? Sweeeeet! (Doing the happy dance, Doing the happy dance!);-)

[rc4wd]

We had some problem here, we expect to ship in 2-3 days from now. Sorry guys...

[LIKES2CRAWL]

We had some problem here, we expect to ship in 2-3 days from now. Sorry guys...
We don't like to hear the word PROBLEM, but hey if it's still good-to-go in couple days that's fine with me.;-)

[rc4wd]

All parts are already done. 200+ of them, we are just having a little bit delay in pre-assemble and test each one of them.

I hope to have some good news by late today or tomorrow.

[run2jeepn]

All parts are already done. 200+ of them, we are just having a little bit delay in pre-assemble and test each one of them.

I hope to have some good news by late today or tomorrow.
Send me one I'll Pre-assemble it and test it. Then get it right back to ya.:)

[Etype R]

Somthing like this might work very well for a truck I am going to build over the winter. I will need a low geared tranny setup that does not take up much space, and this would help a lot. Any idea how long one would be with a ratio around 60:1? or 80:1? I have no idea what I will need in terms of a ratio just yet. I still need to decide on axles and wheels before I get to that part.

And how much extra will one be that is a higher reduction?

[kodiakman]

Will it work on a novak brushess 5800 motor.Can can try on to see if it fits?

[rc4wd]

Just an update for everybody, we expect to update everybody's order with a tracking # today until Monday, we are packing them as fast as we can.

New pictures will be posted shortly as well.

Etype R, price will be the same. Let me know what exactly you need, I can get a small patch made. Our current gear reduction unit housing is already designed from day one to allow lower gear ratio, all we need to do is add one more gear to change the gear ratio.

kodiakman, I dont have that motor to test, but as long as your motor has the same mounting holes as a regular 540 motor, it will work.

[Etype R]

Awsome, I'll let you know what I need once I have my driveline dialed in. Might be 2 or 3 months.

[Jeckler]

Any chance you can offer a taller ratio, like 1.5:1 or so? I have a MT based on a TL-01 chassis, and can't get the rollout correct with the size tires it has and the gearing options available (3 pinions, that's it).

[rc4wd]

Jeckler, can you just use a small pinion gears?

[LIKES2CRAWL]

Are these being shipped yet? and will I be getting a tracking # or anything?

[rc4wd]

Sorry for the delay, we plan to update everybody with a tracking # on Monday.

http://tracgear.com/product/rc4wd/custom/gru/ultra/1.jpg

We are working as fast as we can right now, thanks for your patient.

[LIKES2CRAWL]

No problem, I have some work to do on my clod to tie me over till my GRU comes in for my TLT."thumbsup"

[Jeckler]

Jeckler, can you just use a small pinion gears?

No. Like I said, there are only 3 pinion choices available for the TL-01 chassis. Period. The only possible way is to elongate the mounting holes, but even then I'm limited, as the motor is fairly snug in the hole. I'd rather not destroy the backbone.
If I could get one of your boxes in around a 1.5 ratio, at least that would get me back in the ballpark. I'll have to really do the math to figure out rollout compared to a TC or buggy.

[jwrape]

Are they $39.99 or $49.99. Your site says $49.99. :?:

[rockwerks]

Are they $39.99 or $49.99. Your site says $49.99. :?:

So whats UP with the price jump? inquiring minds wish to know LOL

[Thorsteenster]

jeckler - you want a tt01 that has multi spur and pinion options?

[Thorsteenster]

ok, even at 49.99, i think its still a great price, well after testing determines its strength, id way rather have that then the gd600, which i just bought with the smallest pinion

[Thorsteenster]

rc4wd - what happend to the sand scorcher parts you used to carry? i was just about to order some and they were gone!

[rc4wd]

The $39.99 is our pre-order price, we wrote that in the product discription before. Looks like we forgot about that when we post it on this forum. The price now is $49.99.

We will refund $10 to everybody who purchase the Gear Reduction Unit until October 22, when you plan an order, make sure put your rccrawler username inside the comments box.

thorsteenster, we will bring those back probably next month. We did a lots of blazing and bruiser parts lately and more will come in November.

[LIKES2CRAWL]

I'm glad I pre-ordered it."thumbsup" But now I might be needing another one or two, we'll see what the first one can do first.

[rc4wd]

We are trying hard to keep our product price down, so more people will buy it. A lots of these advanced products wont make money until certain qty get sold.

We rarely change our product price, one reason is because of our customers and another is because of our dealers.

We are very exciting to see what you guys think too. We tested a lots of different prototype version until we got to the production version.

Another interesting fact: Most pre-orders came from Japan.

[Thorsteenster]

the plastic scorcher parts, brake lites, lenses, side mirrors?

[rc4wd]

thorsteenster, yes those will be back soon.

[Jeckler]

jeckler - you want a tt01 that has multi spur and pinion options?

No, I want a a tl01 that has multi spur and pinions options. ;-)

I guess the answer is no on my question about alternate gearing for these boxes.

[rockwerks]

JUst ordered mine today, thanks for holding down the price for us RCC guys!

[rc4wd]

We have already shipped to all customers who placed their order before Thursday, we will work on the rest of orders later on today.

http://www.tracgear.com/product/rc4wd/custom/gru/ultra/2.jpg

By the way who was the guy, whom we promised to ship one for free and suppose to test it out with a brushless. I cant find you email anymore, please contact us asap, so we can ship you one.

[kodiakman]

i emailed you about trying it on my novak and feigao brushless setup.I ordered one already.Thanks

[roktoy]

Looks great.
Jay

[Rckcrwlr]

Count me in on one...My SW2 project will be starting right about the ETA.

Thanks,
John



Just ordered mine at the Preorder price. Thanks for the break. Cannot wait to use them.

Thanks,
John

"thumbsup"

[LIKES2CRAWL]

That thing is gonna look sweet mounted to a Revolver BL. :twisted:

[rc4wd]

LIKES2CRAWL, I cant wait to see some pics...

[NissanNut]

The $39.99 is our pre-order price, we wrote that in the product discription before. Looks like we forgot about that when we post it on this forum. The price now is $49.99.

We will refund $10 to everybody who purchase the Gear Reduction Unit until October 22, when you plan an order, make sure put your rccrawler username inside the comments box.


Nice product! I just ordered mine. I did not know about the comments box thing until I read this.


Thanks.

[LIKES2CRAWL]

Has anybody got theres yet? :-( I checked my status on the delivery and it says:

Status: Missent

Your item was misrouted. The error has been corrected and every effort is being made to deliver it as soon as possible. Information, if available, is updated every evening. Please check again later.

I swear USPS just like to mess with my head and there doing a good job! :roll:

[rc4wd]

LIKES2CRAWL, can you email us your order #, so we can take a look. So we can send a replacement.

[kodiakman]

I got mine today.The only problem with it.It doesn't mount to motor flush like in the pic.Seems like motor shaft is alittle to long or reduction was machined short.i tries it on axion ,lathe ,novak brushless .So i emailed them on it.Seems to be make really good

[NissanNut]

I got my $10 refunded. Thank You very much.

[Rckcrwlr]

Wow is this a nice piece of machinery. I cannot wait to hook it up tonight. I will send pics when done.

Mike,
Do you recommend some gear grease on the gears or no?

Thanks,
John
"thumbsup"

[Cole82]

Well I've been testing mine with good results.
Grease makes the GRU a lot smoother running.
It has a 4:1 ratio so it cuts the speed to 1/4 of what it normally is. It also multiplies the torque by four though.
The GRU isn't phased by the brushless at all.

[rc4wd]

RockCrusher90, please post pics as soon as you can.

[Rckcrwlr]

Here you go...55T Lathe on TXT with 9T Pinion. This thing will crawl up a wall like Spiderman.

Super easy install. Nothing more than taking pinion off placing RC4wd Pinion on motor, a little grease on the gears and mount it with longer M3 screws. Solid mounting.

I may open up my pinion to get a little more wheel spin. 9T is pretty slow...but nothing stops it. I am going to try it tomorrow on my wife's rock garden. :twisted:

Mike,
Thanks for another great product. The other GRU will be going on my SW2 project I am starting this winter.

Thanks,
John

[NissanNut]

I installed rc4wd GRU 4:1 unit today. Its beautiful machine work. I had to use some TLT rods as bolts.


http://nissannut.com/projects/rc_crawler/rc4wd_gru.JPG

I had an issue clearing the spur gear on the rc10 old trans. (I ordered a stealth already) No biggie a spacer fixed that issue. The one pictured is an extra I made.

http://nissannut.com/projects/rc_crawler/rc4wd_gru_installed.JPG

http://nissannut.com/projects/rc_crawler/Done_frt_angle.JPG

Drives AWESOME!!!!!!!!!!!!!!!!



Nice work.

[Jeckler]

I'd still be interested in an alternate gearing, if possible. I figured out today that I'd need a 1.85:1 ratio to get me back to where I should be.

[ZORLAC]

got my gru last week , super cool ,crawls over everything.
running a axiom 75turn with a 10t pinion in my tlt setup.
allmost to slow going to try a different pinion & spur set up to up my speed
best thing you could put in your crawler :)
thanks rc4wd good job!

ZORLAC
KC REMOTE CRAWLERS

[rockwerks]

Just got mine today, nice and precise, beautiful work, just onething, the shipping bag was tore open, shaft hanging out. Is there supposed to be a pinion with this?

[NissanNut]

Just got mine today, nice and precise, beautiful work, just onething, the shipping bag was tore open, shaft hanging out. Is there supposed to be a pinion with this?

Mine was ripped open also. But there was a small pinion in there. It looks like a normal pinion just shorter to fit inside the GRU housing.

[rc4wd]

rockwerks, email us at rcrock(at)gmail.com if you didn't get your pinion gear.

[roktoy]

I can see there might be possibilities for building compact, simple trannies with this unit. Something like this mockup with a 10/44 would yield a 17.6:1 overall tranny ratio.

Jay