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.

Definately Mod 1, tower is wrong.

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?

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.

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

http://i212.photobucket.com/albums/c...closerspur.jpg

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

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

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.

Bullet resistant but not bullet proofed when it comes to brushless :lol::lol:. 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).

Wait, so I HAVE to use the older emaxx input gear, I cant use the new one?

http://www3.towerhobbies.com/cgi-bin...?&I=LXTKP6&P=Z

I cant just cut that to the right length and throw it in lol?

EDIT, now that I look at it, he is using a Gmaxx half case, I locked mine into 2nd, I will post a pic in a min, but its locked into 2nd, and I use the whole case... So I cant use the revo shaft



George, Dang what diffs are you running?

I'm currently running 6 spyder 1/8 scale diffs. I will be removing them in a few days and will be installing a pair of UE 8 spyder 1/8 scale diffs with 5K front and 3K rear diff oil. Current diff cases are UE Ultralites but "might" be swapping them out for my VBS :intello:.

Here's a link to my brushless build: Gmaxx build

Edit- One thing that I did to the 3906 shaft to strenghten it was removing the pressed pin, drilling the hole to 2.5mm, and then installing a hardened pin from a plastic yoke setscrew.

Has anyone run this setup with the stock revo spurs (38T)? Just concerned about motor clearance with the tranny with that small of a gear.

If you are going to run mod1 you may need to switch to MGT spur gears (46, 49, 52t). All you have to do is bore out 3 of the slipper peg holes to 5mm, and then the gear will be a nice tight fit on the slipper hub.

I looked at that, but according to the gearing selector, I need to be down in the high 30's for the batteries I want to run. That would be running a 25T pinion (the biggest mike sells).
I'm heading out to the hobby shop right now to buy the parts for this, and I'll pick up some of the stock gears to check out the fit.

Also, I have to tell someone (since I cant tell the wife!!) I ALMOST picked up a running 3.3 Revo and a good cond. Stampede this morning for 250 off Craigslist (included charger/batteries/ everything). There is one guy going to look at and I'm next in line. Crossing my fingers.....if I get it, that kid in NJ thats looking for a Stampede is going to get his lucky PM.

Don't forget to use a 5x10mm bearing as the Stock 5x11 slipper bearing will not fit the mgt spur. I find that even with the 5x10 bearing I must use a reamer to open up the center hole slightly...

Well, I got everything except for the input shaft....all three LHS didn't have them. Gonna have to order one.

It looks like the stock Revo spurs are going to be too small. I picked up the three different ones, but I really doubt I'll be able to get the motor close enough with that small of a gear.

How about a Jato spur (54, 56, or 58) and say a 30t pinion? That would get you around the 40mph mark per the speed calc.

I was just looking at that (and the stock 3905 Emaxx version). I'll have to check part numbers and see if those are the same parts as they seem to have the same tooth range. From looking at the calculator, I guess the first thing one must do is commit to Mod1 or 32P.

I think I'd like to stick with 32P, since I have about 100 bucks worth of new in package gears downstairs....but of course they are all 12 - 18T.

When going thru the calculators, how does one determine if you are running the motor in the right way (ie., RPM, current, etc)

I've been using the Jato spurs on my G3R and ruslter for some time now. Hold up fine if you set your mesh is right.

I got a 30t stainless steel pinion from Kershaw Designs and a couple spare Jato spurs 56 and 58 (fresh out of 54s) if your interested. I've been debating on offering to sell the 30t to you. I really don't need the pinion anymore.

Per the speed calc the 30t gets my setup over 60mph. I don't need that kind of stress in my life anymore. I've tried it out a couple times. It get's my setup (G3R, G1, 4s 1515 1y/s 54t) hot fairly fast so I have to pay attention to the temps. With todays economy I can't afford to pay attention. I have to check the temps more often when using the 30t so that mean replacing the temp gun battery more often.

Let see........I should live longer with less stress in my life. I can put the money I save from the temp gun's batteries away. I might need it to pay attention to something in my finals days. If I remember I have the money and what it was I was going to pay attention to.

I'm a little confused. Is Arizona Gods official waiting room or is it Florida? How early can you make reservations? Is there a discount to play BINGO if your a member of AARP? How about NRA? Is there a valet for my walker? What about my wife then, got a valet for her? Did that damn dog run off with my teeth again? Well He must of, there's a trail of Efferdent and his walkers gone.

Off topic? Must be a Side (far side) effect of reading through an old Far Side calendar. One seriously warped but funny individual. The more you think about the joke the more you laugh, makes people on the elevator wonder what the hell is he laughing about.

I don't think you'll have the heat issues with the lower kv Neu you have. Eyeballing it on my G1 It looks like 54 -68t spurs shouldn't be a problem w/ the 30t.

http://i212.photobucket.com/albums/c...s/DSCF6335.jpg