I just got the gears in my 87 Mustang changed to 3.73's and on the way home from the shop the rear end locked up about 15 minutes from the shop. I was on the highway, going about 50 about to exit, and both of the rear tires completly locked up. It was quite a miracle that I kept control of the car and actually managed to get it off the road where it would not block traffic, and all of this in 5 o-clock traffic. I called the shop today and they told me that there is no way what they did to the rear end had anything to do with it. Is this true? He said it was probably the posi unit in the rear or the bearings. This car has been driven daily since i got it and I have never heard or felt anything coming from the rear end. The shop seems to very reputible in my area, and I wanted to see what you guys err.. people thought. After I got the car stopped I got out and looked at the rear end and it was smoking very badly. Please let me know what you think, as I had to pay 40 bucks to get it towed to my house and it is going to cost me about $150 to tow it back out to the same shop I had it done at.
Regards B