View Full Version : Pinion Nut

10-18-2012, 05:53 PM
Anyone know the difference between the pinion nut of a 8/69 - 1/78 open diff and the 1/78 - 4/85? Are they interchangeable? I'm guessing not, having never looked at the two side by side, but I thought I'd ask. Thanks.

10-18-2012, 07:22 PM
A fine spine pinion nut will be 1 3/16". A coarse spline pinion nut will be 1 1/8".

Answered my own question, thank you very much!