Getting the Pinion to stay on the motor shaft?

[Thirdgen89GTA]

Originally Posted by George16

Just grind the set screw flat so it will a bigger surface are to "grab" into the shaft. I do this on all my set screws and no problems so far.

I'll try that now before get into doing anything to the shaft. I have plenty of set screws that fit. :)

BTW, the diff looks straight in the 2nd two pics I posted. Can anyone else see any angle?

[bruce750i]

The top of the spur appears to be slightly leaning away from the motor mount. Is it me or has your pinion been losing some weight?

[brian015]

Originally Posted by bruce750i

The top of the spur appears to be slightly leaning away from the motor mount.

+1
Your spur does not appear to be exactly vertical - this means your mesh will not be perfectly aligned - and your pinion will be forced toward the end of the motor shaft and eventually come loose.