1/8 diff in a pede tranny?

[What's_nitro?]

I don't think it could be called a Rustler anymore if you replaced the transmission! That's the one piece that really makes it identifiable. Although I agree it's a good idea, it would be better to be able to fit the 1/8 gears in the OEM housing.

[lincpimp]

I was thinking more along the lines of a slipperential type tranny. Use a top shaft with a slipper and 18 tooth gear, put a k type ofna diff with the 51 tooth plastic spur. Then used modded mgt or jato spurs on the slipper and compatible pinion. 2 custom bulks would have to be made, as well as upper and lower mounts. Upper mount would have to tie into the shock tower. This setup would retain a slipper and give gearing choices. Also the use of the 51 tooth diff gear would allow some room for outdrive clearance. I will mock something up and see if it is doable.

[lincpimp]

Heres a pic of the gears mocked up. Looks to me like it would work. I set the gears up so that I would have enough clearance between my plett maximum and the 51 tooth diff gear. Compared to the stock tranny case, it is very similar in size. 51/18 gives 2.8, a little more than the pede 2.72 tranny ratio. That is a 46t mgt spur, and a 12 tooth pinion would give me the right gearing for my maximum on 3s, around 40mph. Plenty of outdrive clearance too.




Heres the BrainG speed calc:

Differential Ratio: 1
Transmission Ratio: 2.8333333
Other Ratio: 1
Spur Tooth Count: 46
Pinion Tooth Count: 12
Total Voltage: 11.1
Motor KV: 3000
Tire Diameter (inches): 4.6
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0
Spur/Pinion Ratio: 3.83 : 1
Total Ratio: 10.86111 : 1
Tire Circumference (inches): 14.45 inches (367.06mm)
Total Motor Speed: 33300 RPM
Vehicle Speed: 41.96 MPH (67.4km/h)
Effective Speed Rate: 3.78mph/V (6.07kmh/V)
Effective KV Value: 3000
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...

[dadnjesse]

http://www.swami-rc.com/ordering/
Did you see the new one that swami sells.
http://www.rc-monster.com/proddetail...edediff&cat=30
Also looks like mike has updated his version to hardened steel!

[lincpimp]

That is the steel/alloy diff that everyone references. Seems a little overpriced compared to the 12 dollar traxxas vxl steel diff. I have run both and see no benifit to the more expensixe one.