The Inside of the New RC4WD 2spd Trans

[Jeepfixer1]

I got my new RC4WD trans in and I have to say its sweet. One thing that bothered me is it felt like it needed more grease! So I wanted to see how they went about the 2 speed shifting mechanism and how tough it was made too. I know the rest of you guys that didn't want to take yours apart would at least like to see inside it! Well here you go!

This is inside the front part. These teeth make up high gear.


Here is another front part shot. You can also see the inside of the front housing to the left.


Here is the mid case with the counter shaft on the left and the rear case with the shift fork and high and low final gears on the right!


Here is another pic of the final drive. The shaft at its closest part to you is where the front driveshaft will go on.


Here is one last shot of the final drive. In this one you can see the teeth that actually engage into the front/high gear. It is in low/the rear gear in the pic.




Hope you enjoyed!

[ESC]

Looks nice do you think it could handle the pro4?

[eric113]

If I get one these trans... first things to replace is the bearings.

Is the output shafts one piece ?

[frdtrkguy]

Originally Posted by eric113

If I get one these trans... first things to replace is the bearings.

How come?

[eric113]

Originally Posted by frdtrkguy

How come?

Just how I'am.

I like to see this trans in your truck... would have to be so much fun!

[JeremyH]

Originally Posted by frdtrkguy

How come?

Because the bearings that RC4WD uses are terrible.

[frdtrkguy]

Originally Posted by eric113

Just how I'am.

I like to see this trans in your truck... would have to be so much fun!

I thought you were implying that there was a problem with the bearings used by RC4WD


You know, I was thinking about it but I think dig would be more useful. Im happy with the speed and crawlability with the pro4..

[frdtrkguy]

Originally Posted by JeremyH

Because the bearings that RC4WD uses are terrible.

Not surprised but Iv'e never heard that

[Grundy]

"Thanks for showing me yours"

Now I see why the play, when shifting from one gear to the other.

[TLTCrawlin]

Would really like to see someone put down some power and try to break one, see what it takes.

[Jeepfixer1]

Originally Posted by ESC

Looks nice do you think it could handle the pro4?

I'm not sure, I'm gonna run the 13.5 cause I am running it now.

Originally Posted by eric113

If I get one these trans... first things to replace is the bearings.
yep I thought rubber sealed ones would be good, it has metal guarded now but not sure how well they seal
Is the output shafts one piece ?

I don't think they can be because the gear it's not in has to be able to free wheel.

Originally Posted by frdtrkguy

How come?

cause that's how he is!

Originally Posted by eric113

Just how I'am.
Just how you are!
I like to see this trans in your truck... would have to be so much fun!

Im not sure about your truck but I hope it's fun in mine

Originally Posted by JeremyH

Because the bearings that RC4WD uses are terrible.

I hope they hold up for now!

Originally Posted by frdtrkguy

I thought you were implying that there was a problem with the bearings used by RC4WD


You know, I was thinking about it but I think dig would be more useful. Im happy with the speed and crawlability with the pro4..

pro 4 is a badass but low gear when your bound up in the rocks is badass too!

Originally Posted by frdtrkguy

Not surprised but Iv'e never heard that

me either

Originally Posted by Grundy

"Thanks for showing me yours"

Now I see why the play, when shifting from one gear to the other.

Your welcome, I think the play isn't gonna hurt anything. Probably necessary for easy gear engagement .

[Lukefalls]

It appears very similar in function to the way a Summit 2spd works. The Summit is all plastic and handles abuse. I bet this will handle a Pro 4.

[wraithfreak]

Nice... I likey... so call me a noob or whatever but besides the trans what actually do I need to mount this awesome piece of equipment ? Can I use my stock RTR radio or do I need to switch to my cheap ass (Yes go ahead and laugh) Airtronics radio?

[Postclanker]

Originally Posted by JeremyH

Because the bearings that RC4WD uses are terrible.

First hand account...or just an opinion...????

[Katan]

The output shaft is one piece. The final gears sit on bearings on the output shaft. The slots in the gears allow shifting on the throttle but do have the side effect of a little play (1/3 rotation on the first turn of the spur) before the output turns.

This design actually contains less gears than the Summit trans.

[Jeepfixer1]

Originally Posted by wraithfreak

Nice... I likey... so call me a noob or whatever but besides the trans what actually do I need to mount this awesome piece of equipment ? Can I use my stock RTR radio or do I need to switch to my cheap ass (Yes go ahead and laugh) Airtronics radio?

If it were me, i would get at least a 3ch radio Prefer 4ch (you will always find more stuff to run off your remote. RC4WD makes a really nice one for an awesome price. Also the ones on flea bay out of a traxxas summit would be a good choice. Plus you will need a servo and preferably a small servo saver like i have posted below here to keep your servo from struggling.

Originally Posted by Lukefalls

It appears very similar in function to the way a Summit 2spd works. The Summit is all plastic and handles abuse. I bet this will handle a Pro 4.

i think it will too, looks very well made. i am impressed. I personally think RC4WD built a great product for a great price!!!

Originally Posted by Postclanker

First hand account...or just an opinion...????

They look good to me. they are metal shielded. typically i see most people (like fast eddy) using rubber sealed bearings. i dont know but im sure someone on here does. Do metal shielded beaings seal as well as rubber sealed bearings?

Originally Posted by Katan

The output shaft is one piece. The final gears sit on bearings on the output shaft. The slots in the gears allow shifting on the throttle but do have the side effect of a little play (1/3 rotation on the first turn of the spur) before the output turns.

This design actually contains less gears than the Summit trans.

Soory Katan, i didnt want to misrepresent. I meant the gears are not made to the output shaft , they cant be by design. doesnt matter though, it is very well made and should hold up! I hope you dont mind me showing your insides, I know most people like to see how it works and the size of the metal gears.
Well done bud, I think everyone will be pleased with theirs.

[Jeepfixer1]

If you are having servo issues with no EPA adjustment on your remote, all you need is a light pressure type servo saver. This is what Traxxas uses to shift the transmission on the t maxx or working the locking axle servos!
Either one of these can be had for really cheap and with free shipping off eBay. Just enter these part numbers and live worry free with your shifting servo.
Ps your Lhs prob has these or on the lower one you could also use nitro fuel tubing instead of springs! Let me know what you think!

Traxxas 3988x



Traxxas 4968

[Katan]

Originally Posted by Jeepfixer1

Soory Katan, i didnt want to misrepresent. I meant the gears are not made to the output shaft , they cant be by design. doesnt matter though, it is very well made and should hold up! I hope you dont mind me showing your insides, I know most people like to see how it works and the size of the metal gears.
Well done bud, I think everyone will be pleased with theirs.

Thanks. Don't mind at all

[Meatwad]

Originally Posted by Jeepfixer1

They look good to me. they are metal shielded. typically i see most people (like fast eddy) using rubber sealed bearings. i dont know but im sure someone on here does. Do metal shielded beaings seal as well as rubber sealed bearings?

Metal shielded bearings are typically more free spinning than rubber shielded. But do not seal as well as rubber. Metal shielded both sides are fine for use inside cases (trans, axle cases) rubber shielded are meant for external uses that will see the elements. Then there are rubber/metal hybrids which are nice for uses that one side will see the elements while the other side is inside a case

[Jeepfixer1]

Thaks meatwad, that's kinda what I was thinking. All the bearings are metal shielded in this trans and I like the water! I think I'm up for some bearing mods down the road.