Originally Posted by
rdallier
Need I little help guys I just a TRF415 and have a lot of question
1 What the tyranny ratio
2 Part number for a ball diff for the front
3 The place to buy parts in the US
4 Gearing for 13.5
5 Can you use any spur gear on it beside the Tamiya
Thanks
1. If your pulleys are black colored, your internal ratio is probably 2.1875.
If your pulleys are white colored, your internal ratio is probably 2.25.
2. The part number for the ball diff is #53921. It does not come with a diff pulley, you need to buy that separately.
3. Try your local hobby shop...
4. Depends what track your going to run the 13.5 and how large the track is.
5. You can use any standard spur gear I believe. The Tamiya spur gears are a metric pitch, 0.4 module. Although 64 pitch pinions work fine on it.