RCCrawler Forums

JeremyH · 01-17-2007, 06:16 PM

That is what I was thinking as well, but you never know...there are some creative folks out there!

BENDER · 01-17-2007, 06:18 PM

Quote:

Originally Posted by JeremyH

That is what I was thinking as well, but you never know...there are some creative folks out there!

If someone has done it I'd like to see it too.

JeremyH · 01-18-2007, 07:20 AM

Quote:

Originally Posted by dittohead

I believe if you move to 64 pitch gears you can get a 12/90 on a pede.

Do you know if that diameter gear will work with the larger Maxx yokes?

dittohead · 01-18-2007, 12:43 PM

Im not sure if they would fit with maxx yokes or not. I believe the ratio of the trans is 2.72:1, the spur/pinion (87/12) ratio is 7.25:1, and the axles are 2:1. After doing the math i get 39:1 gearing, which is super high. A tlt is geared lower than that and they have alot smaller tires. Doubling that to 80:1 would be enough gearing IMO. Thats why i wish someone had a 4:1 axle gear kit available. The rc4wd portal boxes look like a sweet solution but at $200 and a higher COG i would rather do something else. What about a rc4wd planetary reduction unit bolted to the motor? They are 4:1 that way you have room to gear up to get the desired wheelspeed, but you will need to cut the chassis to fit in the unit, or go to a shorter brushless motor. I just ran the numbers on my setup and its 56:1 and shorter tires, and i need alot more gear to be happy with it.

JeremyH · 01-18-2007, 02:14 PM

You know, I was thinking that would be a good solution, but was also unsure if it would fit with the SW2 chassis. With the wider skid, the motor is just inside the SW2 chassis.

I think I might give that a shot as I dont think those larger spur gears will fit on the pede tranny with the Maxx yokes.

Thanks for the tips!

JeremyH · 01-22-2007, 06:05 PM

Well, a GRU a new Tekin2 and a 65T Axiom has my rig crawling as slow as could be!

I think that 4:1 gearbox did the trick!

BTW, I had absolutely no problems getting the GRU to fit in the SW2 with the 3" trans skid.

dittohead · 01-22-2007, 07:50 PM

NICE! I wish i could get parts up here that quick

I ordered a 75t lathe as a cheap/easy solution to the gearing dilemma but it will be another 2 weeks until it even shows up

There is no way i could get the GRU in my truck unless i hack a LARGE piece out of the chassis, because im running a R2 that sticks out of the trans cutout in the frame. Its cool that you found a fairly easy solution to the gearing problem!

JeremyH · 01-22-2007, 07:57 PM

Thanks for the compliment!

Maybe you can clock that R2 90* and get a GRU to fit?

dittohead · 01-23-2007, 08:54 AM

Im actually thinking of reworking my entire drivetrain layout, which would reduce the torque twist tremendously, and move the battery weight around better. i would also be able to get a GRU in there no problem!

JeremyH · 01-23-2007, 09:07 AM

Quote:

Originally Posted by dittohead

Im actually thinking of reworking my entire drivetrain layout, which would reduce the torque twist tremendously, and move the battery weight around better. i would also be able to get a GRU in there no problem!

Awesome! Post up your pictures and tips to eliminate torque twist. I am still playing with springs and oil weight in the rear end of my truck. It has too much squat upon take off.

JeremyH · 02-25-2007, 10:37 AM

Well, I found a pretty good deal on a set of TT Servo Mounts. I also am begnning the rear steer setup. I just need to build the links and it'll be ready. Here is a picture of the rear axle:

1.1 sport trac · 03-01-2007, 08:22 PM

Nice and clean build now go get some rock rash on it

JeremyH · 03-01-2007, 08:25 PM

Yeah, have been fine tuning some stuff and then ran into a few problems.

After I wired up the rear steer and got it working, the front servo began to act funny. When I powered up the Tx and Rx, the front servo would turn completely to one direction and not move. Turn them off and I could move it back by hand.

Now the ESC will not come on at all...

Havent encountered this problem before on any of my other crawlers.

BTW, I did not change the wiring setup of the front servo during rear steer install...

metomwhou · 03-15-2007, 06:20 AM

Quote:

Originally Posted by dittohead

Thats why i wish someone had a 4:1 axle gear kit available. The rc4wd portal boxes look like a sweet solution but at $200 and a higher COG i would rather do something else.

Check these two links out. EGRESSor has come up with that solution. I think he sells a kit, could be wrong about that though.
1:4 gear ratio Jugg axle
http://www.photobox.co.uk/album/3252964

Tom

JeremyH · 03-15-2007, 07:26 PM

He doesnt sell a kit, but I did see that gear setup for sale on this forum.

crallin 4 life · 03-19-2007, 05:50 PM

cool i like the body

JeremyH · 03-19-2007, 08:06 PM

Thanks!

Tanis · 03-19-2007, 08:22 PM

What servo are you running on the back? The front is a 5955 right? If the rear is a digital, you will need a rx pack or voltage regulator. Quite a few people have fried the BEC on the TR2 running 2 digital servos.

JeremyH · 03-20-2007, 05:33 AM

The rear has a 645. I do think that my ESC is fried though. The crawler worked fine and then one day, nothing. I cant get the esc to turn on.

CLODZ_72_2003 · 03-25-2007, 09:04 PM

any test runs yet?

Alfy

01-17-2007, 06:16 PM	#21
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	That is what I was thinking as well, but you never know...there are some creative folks out there!

01-18-2007, 12:43 PM	#24
dittohead RCC Addict Join Date: Feb 2005 Location: Vancouver Island B.C. Posts: 999	Im not sure if they would fit with maxx yokes or not. I believe the ratio of the trans is 2.72:1, the spur/pinion (87/12) ratio is 7.25:1, and the axles are 2:1. After doing the math i get 39:1 gearing, which is super high. A tlt is geared lower than that and they have alot smaller tires. Doubling that to 80:1 would be enough gearing IMO. Thats why i wish someone had a 4:1 axle gear kit available. The rc4wd portal boxes look like a sweet solution but at $200 and a higher COG i would rather do something else. What about a rc4wd planetary reduction unit bolted to the motor? They are 4:1 that way you have room to gear up to get the desired wheelspeed, but you will need to cut the chassis to fit in the unit, or go to a shorter brushless motor. I just ran the numbers on my setup and its 56:1 and shorter tires, and i need alot more gear to be happy with it.

01-18-2007, 02:14 PM	#25
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	You know, I was thinking that would be a good solution, but was also unsure if it would fit with the SW2 chassis. With the wider skid, the motor is just inside the SW2 chassis. I think I might give that a shot as I dont think those larger spur gears will fit on the pede tranny with the Maxx yokes. Thanks for the tips!

01-22-2007, 06:05 PM	#26
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	Well, a GRU a new Tekin2 and a 65T Axiom has my rig crawling as slow as could be! I think that 4:1 gearbox did the trick! BTW, I had absolutely no problems getting the GRU to fit in the SW2 with the 3" trans skid.

01-22-2007, 07:50 PM	#27
dittohead RCC Addict Join Date: Feb 2005 Location: Vancouver Island B.C. Posts: 999	NICE! I wish i could get parts up here that quick I ordered a 75t lathe as a cheap/easy solution to the gearing dilemma but it will be another 2 weeks until it even shows up There is no way i could get the GRU in my truck unless i hack a LARGE piece out of the chassis, because im running a R2 that sticks out of the trans cutout in the frame. Its cool that you found a fairly easy solution to the gearing problem!

01-22-2007, 07:57 PM	#28
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	Thanks for the compliment! Maybe you can clock that R2 90* and get a GRU to fit?

01-23-2007, 08:54 AM	#29
dittohead RCC Addict Join Date: Feb 2005 Location: Vancouver Island B.C. Posts: 999	Im actually thinking of reworking my entire drivetrain layout, which would reduce the torque twist tremendously, and move the battery weight around better. i would also be able to get a GRU in there no problem!

02-25-2007, 10:37 AM	#31
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	Well, I found a pretty good deal on a set of TT Servo Mounts. I also am begnning the rear steer setup. I just need to build the links and it'll be ready. Here is a picture of the rear axle:

03-01-2007, 08:22 PM	#32
1.1 sport trac Quarry Creeper Join Date: Mar 2006 Location: Terrell, NC Posts: 204	Nice and clean build now go get some rock rash on it

03-01-2007, 08:25 PM	#33
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	Yeah, have been fine tuning some stuff and then ran into a few problems. After I wired up the rear steer and got it working, the front servo began to act funny. When I powered up the Tx and Rx, the front servo would turn completely to one direction and not move. Turn them off and I could move it back by hand. Now the ESC will not come on at all... Havent encountered this problem before on any of my other crawlers. BTW, I did not change the wiring setup of the front servo during rear steer install...

Sponsored Links

03-15-2007, 07:26 PM	#35
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	He doesnt sell a kit, but I did see that gear setup for sale on this forum.

03-19-2007, 05:50 PM	#36
crallin 4 life Newbie Join Date: Mar 2007 Location: southamtion Posts: 2	cool i like the body

03-19-2007, 08:06 PM	#37
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	Thanks!

03-19-2007, 08:22 PM	#38
Tanis Keep it real Join Date: Jun 2006 Location: Yakima,WA Posts: 6,532	What servo are you running on the back? The front is a 5955 right? If the rear is a digital, you will need a rx pack or voltage regulator. Quite a few people have fried the BEC on the TR2 running 2 digital servos.

03-20-2007, 05:33 AM	#39
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	The rear has a 645. I do think that my ESC is fried though. The crawler worked fine and then one day, nothing. I cant get the esc to turn on.

03-25-2007, 09:04 PM	#40
CLODZ_72_2003 Rock Stacker Join Date: Feb 2004 Location: Jerzey Posts: 92	any test runs yet? Alfy

RCCrawler Forums

Thread: My TXT Build