Thank you Bwitched.
Interesting on the crush collar. There must be a better way to manage the preload.
What torque did you use to avoid damage to collar? Or, did you manage it by # or turns?
What's the purpose of the custom wrench that bolted onto the input flange?
The wrench I made was to hold the pinion gear (as it is not in the main housing) so I could set preload with a new crush collar.
Since you are just changing the seal I would scribe a mark in the nut and pinion shaft and make sure you get it right back in the same mark. The nut is locked in place by peening (sp?) down the edge after it is tight. TAKE YOUR TIME getting back to the same point, the collar is a one shot deal, go to far and your screwed.
The pinion was very difficult to set preload on compared to other differentials I have rebuilt in the past. I wasted one crush collar trying to get the preload I wanted on the bearings, I would have loved to have know what the factory sets them at. I did a lot of research to come up with the spec that I used. Time and some mileage will tell if I got it right but for now it is incredible how quite it is.
