Hi everyone, last weekend I rebuilt and swapped in a Dana Super 70 from a 2004 Express 3500 to my 1982 K20. The carrier I purchased was a power lock from East Coast Gear Supply for a 70HD. To use this carrier I had to shorten one of the axle shafts because the center pin from the Super 70 carrier was offset differently than the power lock unit.
The issue I'm having is after 3 days of driving, the diff is really binding up after I backup and turn, it's almost like the limited slip is locked up. I know what chirping feels like, pretty common in a new LS unit but this is pretty aggressive compared to what I've witnessed. The oil I used was master pro 70w-140 synthetic and two 4oz bottles of Spicer friction modifier. Shouldn't that be enough to prevent to clutches from binding? I am going to pop the cover off this weekend and try RedLine Shockproof Heavy. But I wanted to hook my peepers on that carrier and see if there's anything going on in there.
On the first drive with this set-up, everything was REALLY smooth and I was super pleased with it. Now I am upset. Any advice is welcomed, thanks.
I've included photos of the carrier, ring and pinion box, and the axle shaft I shortened.
01-20-2021, 05:31 PM
Threaded Mode