[Mike C]

I should have been more specific. The only things are the clutch packs and the bevel washer. The bevel washer is basically a spring washer in the clutch pack, it is what preloads the diff like the coil springs in an Eaton. With friction modifier and new gear lube I would think 100k mile reliability would be fine.

The PowerLok is easy to rebuild because it is a 2 piece case. You don't have to rotate the spider gears in. It is also a 4 pinion limited slip, so each spider gear has 1/2 as much load as in a Trak Lok. The Trak Lok was the G80 optioned diff in the 3/4 ton trucks, while the PowerLok was the max traction axle in the Dana 60 trucks I'm pretty sure.

But like I noted above, it is reasonably complicated work to install a diff in a 60 and get backlash and preload set. It requires a bearing puller and case spreader to do it right. I know several guys on the board have done their own without the spreader and seem to have no troubles. We will see what the bearing life is as time goes on.