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I have a 69 Vette. Last year I dropped the rear swing arms and disassebled them, blasted, painted them and had new bushings, bearings, races and seals installed on both sides by a mechanic who said he had done may of these rebuilds in the past at a GM dealer. I also installed all new u-joints in the drive shaft and both 1/2 shafts. I notice when I have it on the rack and spin the wheel by hand or puch the car that it feels like it is binding up in the rear end.
I have a 69 Vette. Last year I dropped the rear swing arms and disassebled them, blasted, painted them and had new bushings, bearings, races and seals installed on both sides by a mechanic who said he had done may of these rebuilds in the past at a GM dealer. I also installed all new u-joints in the drive shaft and both 1/2 shafts. I notice when I have it on the rack and spin the wheel by hand or puch the car that it feels like it is binding up in the rear end.
Any ideas?
Jabo
You can't really judge any rotational problems with the rear suspension hanging (on a lift). Their will be a bind due to the extreme u-joint angles. The binding on acceleration may be due to the posi-traction clutches grabbing. Try adding a bottle of posi-additive into the differential...G/L
I would get the car up and use a socket to get the t arms to ride height on each arm. With it in neutral try and rotate the tire to see if you can feel which side is binding.
It may be parking brakes, wrong rear bearing setup, brake hose closing-causing the caliper to drag,or possibly the posi clutches. You can pin point the area by disconnecting the 1/2 shaft do only the rotor is moving to see if it's still dragging. Usually when the posi is grabbing it hammers hard around corners.
Gary
Lift the rear and place a jackstand under each trailing arm, then lower the car onto the jacks. Now the half shaft angle is okay and you can rotate the wheels
I had the same problem to the point the right rear on my 75 locked up almost completely. I had the trailing arms rebuilt like you but I also replaced the rear brake rotors for to much runout. I think what was happening to my car was the excessive runout was pumping air into the rear braking system which is like applying the brakes.
Hope this Helps
Steve
Thanks for the help. I do have a set of 6 foot tall jack stands and will try to lower the rear of the car on the stands to see if I still get the binde without the angle.