1968 automatic rear end issues
Thread Starter
8th Gear
Joined: Apr 2017
Posts: 8
Likes: 1
From: Austin Texas
1968 automatic rear end issues
Hey folks,
Looking for some advice or information on why after the car heats up I have this noticeable thumping sound when I turn left or right at any rate of speed greater then a crawl.
I first noticed this after buying the car and driving it home.
Since I have very limited and virtually no knowledge of what it might be I had a friend drive it. He indicated it might be limited slip issue. I checked the fluid level and everything appears to be full. Also, trying to educate myself I watch this video
but not sure if this is even my issue or not.
Outside of that the car runs fine and I have driven it for hours at a time with no issue other then the weird noise.
Any help would be greatly appreciated.
Looking for some advice or information on why after the car heats up I have this noticeable thumping sound when I turn left or right at any rate of speed greater then a crawl.
I first noticed this after buying the car and driving it home.
Since I have very limited and virtually no knowledge of what it might be I had a friend drive it. He indicated it might be limited slip issue. I checked the fluid level and everything appears to be full. Also, trying to educate myself I watch this video
Outside of that the car runs fine and I have driven it for hours at a time with no issue other then the weird noise.
Any help would be greatly appreciated.
Melting Slicks
Joined: May 2012
Posts: 2,192
Likes: 344
From: Allenton Wisconsin
I would suspect the posi oil additive has broken down. Change the differential oil and also use the additive. I use the product right from a chevy dealership. After you're done find an empty parking lot and do some figure eights, this should cure your problem. Had same situation with my 69 auto when I first got it. T
