Bloodhound1981
Full Access Member
- Joined
- Nov 15, 2016
- Posts
- 200
- Reaction score
- 450
- Location
- MA
- First Name
- Rusty
- Truck Year
- 1981
- Truck Model
- C-10
- Engine Size
- 5.7
What were you hoping for with that title you perverts? Ha, so I am having a vibration at around 67-72mph, and again way worse at about 85. It does it on the dyno so obviously it's drive line related. Wheels have been balanced, no change. The driveshaft was re-balanced with new u-joints when I was building the truck, that was about 6 years ago. I've only now started driving it, have about 1000 miles on it. The driveshaft could still be suspect, I will take that to get it checked. In the meantime, my 12 bolt posi 3.73 rear end is chattering on turns from a stop, especially when hot. I changed the oil again with Valvoline 80w90 and AC delco posi additive. No change. I am wondering if the chattering on turns and the highway speed vibration could be related. Clearly the posi clutches are sticking. I did the whole parking lot u-turn thing too, no change. Just curious if anything looks weird from the photos? Is it normal to have pitting on the carrier? I had this rear end built for me 30 years ago, it has about 30,000 miles on it, but sat for about 20 years. Maybe time for a rebuild?
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