Revo Slipper on E-Maxx Tranny Mod :)

[xcntrk]

Great info in this thread!

I’m attempting this conversion but have a few questions:

1. Are the MGT spurs 32p or mod1 pitch? Are there any mod1 pitch spurs compatible with this slipper setup?
2. For those who have closed the 10mm distance, between the motor and slipper plate, was it necessary to reposition the idler gear on the shaft (i.e. drill new hole, etc)? Or did you simply trim the rear of the shaft and shim the front to set the entire shaft back? (Gorilla tranny obviously)
3. Is the new 3905 Emaxx input shaft the same as the Revo input shaft? Seems this upgrade “kit” from Traxxas is the easiest/cheapest way to gather all these parts (less spurs/pinions):
   http://www3.towerhobbies.com/cgi-bin...351x&search=Go

????

[Janezki]

So, to make this work for stock gearbox of 3906 E-Maxx, these parts are needed?
- 3992 input shaft
- 5351 slipper plate
- 5352X slipper rebuild kit
- 3969 output shaft
- 3984X output gear
- 3996X steel idler

And all modifications needed is to shorten the input shaft or drill a hole to the rear cover?

[E-Revonut]

there is no need for the output shaft or gear, stock e-maxx works. I did this mod myself and shortened the shaft, but I would recomend drilling a hole instead. You can use a 32p spur from the new maxx or modify a MGT spur (mod1) by drilling out three peg holes to match the revo slipper, I used a 13/64 drill bit, and u need washers on the screws that hold the gear on. I also needed to team out the center hole to accept a 5x10 bearing, 9 was to small and the 10 just didn't want to go in. I must say that the mod1 is the way to go, it handles the gl power much better than 32p. Good luck!

[xcntrk]

This is why I’m having trouble with the MGT gear pitch confusion.

Tower-Hobbies and RC-Planet descriptions of a Kimborough spur:

Name = "Kimbrough Spur Gear 50T Module 1 Monster GT"
Description = "Kimbrough 32P 50T Spur Gear"

http://www3.towerhobbies.com/cgi-bin...?&I=LXGFW7&P=7
http://www.rcplanet.com/Kimbrough_Sp...r_p/kim350.htm

What????

[Janezki]

Ah, thanks E-Revonut.
I don't need this for myself, but for a friend with the older Maxx with brushless setup.

[suicideneil]

Xcntrk- that is somewhat confusing isnt it? lol. I believe though that they are MOD1 gears- something slightly chunky about the teeth that leads me to believe they are not 32p.

[lincpimp]

Originally Posted by xcntrk

This is why I’m having trouble with the MGT gear pitch confusion.

Tower-Hobbies and RC-Planet descriptions of a Kimborough spur:



http://www3.towerhobbies.com/cgi-bin...?&I=LXGFW7&P=7
http://www.rcplanet.com/Kimbrough_Sp...r_p/kim350.htm

What????

Definately Mod 1, tower is wrong.

Originally Posted by pun15her

Here is mine so far.
I am using the revo input shaft with 7mm sawn off the end,along with the revo output shaft. This is with the 68t e maxx spur attached.(This was the only spur my local shop could get for now!)

Cheers P

pun15her, can you post some part numbers? That is exactly what I need, because I have the G1 tranny also. I just ordered my Neu and I know I definitely have to do this mod now.

Thanks

[xcntrk]

Alright, so lets explore gear-cover options for this modification.

I’m presently using an un-modified revo input shaft and the gear sticks out excessively from the motor plate. Soon I’ll be using a modified shaft to close that distance, but still the Revo slipper sticks out pretty far likely rendering the stock gear cover unusable.

The other day my maxx spun to a sliding stop in some loose (and fine) rock/sand. When I tried to apply throttle it clearly binded and went nowhere. Fortunately I immediately stopped trying to give it gas, when I got to the rig the ESC was 190F and the drivetrain was completely locked. Upon further inspection, a tiny pebble had lodged in my MGT spur and forced to imbed in the plastic teeth by the steel pinion. I had to use a knife and actually cut it out. The bottom line is no gear cover (and a skeleton chassis w/lots of holes) is clearly leaving this gear too exposed for this to occur. Can you imagine at WOT and full amperage? It would immediately toast your ESC!

What's the REVO use for gear cover and maybe it can be modified to fit?

[GorillaMaxx360]

you can use a gear cover you just need to install spacers to move the gear cover out a bitt so it clears the spur gear. I did this but there is still a half inch gap. what you can they do is cover that gap with electrical tape.

[Gee]

Here a FYI for anyone thinking about using the 3905 shaft in the G1 transmission. It needed some mods done to the gear and the shaft is 37mm longer then the revo shaft. It does sit the spur right next to the motor mounts. Here's a link to a post with some details the G1 3905 mod is at the end of the thread.

http://monster.traxxas.com/showthread.php?t=412386

So to bring this back up

I have a complete revo slipper kit, I just need the new emaxx 3905 input shaft, and a steel idler? That makes a bullet proof emaxx trans?

Is the RCM one better then the traxxas one? Id rather order everything from tower hobbies, but if the RCM one is better, might as well just do it right the first time

[e-mike]

me too i do this modiff on my 3906 tranny and now its a bullet proof slipper

[suicideneil]

Only RCM and UE sell steel idlers for the emaxx 3906 tranny; the traxxas ones are a different size for the 3905 tranny = no good.

http://www.rc-monster.com/forum/showthread.php?t=11589

For a definative guide/ how-to.

[George16]

Originally Posted by BlackedOutREVO

So to bring this back up

I have a complete revo slipper kit, I just need the new emaxx 3905 input shaft, and a steel idler? That makes a bullet proof emaxx trans?

Is the RCM one better then the traxxas one? Id rather order everything from tower hobbies, but if the RCM one is better, might as well just do it right the first time

Bullet resistant but not bullet proofed when it comes to brushless . I contemplated on doing that since I have 2 3906 trannies but I opted for the Strobe slipper and my home-made sprong. So far it's been working very well with my setup (1515 1Y, 6S Lipoly).