Originally Posted by
silvalis
it's a Ion3 13.5/VTX1 currently in blinky. It's pulling while going straight, no steering input.
I'm pretty sure most of the above is fine, but looking at your list I'll have to go over it with a fine tooth comb.
I'm still leaning towards it being the diff for some reason. Any hints on what to look for in a ball diff that pulls unevenly?
If you've rebuilt it correctly a couple of times so far .. then I'd look to the list I provided. Just in case though ..
1. Make sure the balls don't have flat spots (I use ceramics)
2. Make sure the rings are not grooved too badly (new rings or flip them or sand them.
3. Make sure the bearings spin freely.
4. Make sure the thrust washer is installed correctly.
5. Make sure the cone washers are installed correctly.
6. I use associated silicon diff grease (clear grease- red label).
Alot of times, a crash can knock some toe/camber into the car .. put it on a setup station to check.
Also sometimes, the front end can get a little tweaked, loosen the screws that hold the front end on, and re-tighten them equally, alternating screws.
Do you rotate your front tires, left/right ever? every run? doing so, will give you more tire life as wel.