C2 rear suspension / handleing problem

[Stan E.]

I have a C2 rear suspension problem. All parts are new except the original (63) spring was rearched to spec. When I accelerate ,only 300 HP, the rear of the vehicle goes down and seems to pull the rear to the right. I must steer to the right. When I decelerate the rear of the vehicle comes up and the front of the vehicle must be steered right. Passed PV. Dangerous! Everything is tight,no broken welds and I believe the posi to be free. HELP!

[Harry S.]

Re: C2 rear suspension / handleing problem

When the rear spring was installed was the final torquing done with the wheels on the ground? If your not sure check the spring, are all the leaves still aligned or have they twisted out of shape.

[Larry M.]

Re: C2 rear suspension / handleing problem

Stan:

Was a rear alignment done after the rear suspension work?? What were the final settings??

Larry

[Dick W.]

Re: C2 rear suspension / handleing problem

I most definitely would check all the bushings, front and rear plus have a four wheel alignment performed. The squat on acceleration and the raising of the rear on decel are normal, what is not is the pulling. I suspect that you have a bushing(bushings) worn and allowing a caster change causing the pulling.

[Terry M.]

Re: C2 rear suspension / handleing problem

Also check the bushing at the front of the differential. If that bushing is worn the car will squat more than normal and may want to pull to the right on acceleration.

[Michael W.]

Re: C2 rear suspension / handleing problem

Possible some trailing arm alignment shims fell out. Very common when later slotted shims are used on an early car with no retaining cotter pin.

[Jerry G.]

Re: C2 rear suspension / handleing problem

Toe in setting in the rear is very important. The suspension will go through toe in to toe out in compression so if you don't start out with enough on both sides you will get this type of behavior. I had it in turn 5 at Laguna Seca.

[Stan E.]

Re: C2 rear suspension / handleing problem

Car has total restoration with 105 miles on Duntov. It's all new with 3 allignments, all new parts front and rear, everything is tight. I welded welding rod over shim openings. It took 7 Cooker 6/70-15's to get four to balance.

[Edward J.]

Re: C2 rear suspension / handleing problem

Stan, from what your explaining it sure sound like the posi clutchs are locked. Years ago when at a Chevrolet dealership we to have Joie Chitwood thrill show come to town for a yearly town fair and If you don't know them they were stunt drivers who like to drive on two wheels.and of coarse they where all Chevrolets. and every year they would break something, rear ends, and transmisson where common, I did the major repairs on there cars. and we always welded the gears in the rear diff. and they also use front drive cars and the transmisson spider gears were also welded. if you ever drove these cars on the open road , they drive like what your explaining, accelarating the car goes in one directional and when decelarating the other way. is this what your experiencing?

[Joe L.]

Re: C2 rear suspension / handleing problem

Car has total restoration with 105 miles on Duntov. It's all new with 3 allignments, all new parts front and rear, everything is tight. I welded welding rod over shim openings. It took 7 Cooker 6/70-15's to get four to balance.

Stan------



Does all parts being replaced include the large cushions installed on either side of the differential crossmember?

[Mike E.]

Re: C2 rear suspension / handleing problem

What about one bad as in totally not working shock?


Mike

[Michael W.]

Re: C2 rear suspension / handleing problem

Upper A arm alignment shims fell out, leaving a gap.

[Stan E.]

Re: C2 rear suspension / handleing problem

Joe, car has new crossmember cushions. Front end is tight. Shocks are all new. Ed, posi has double lube. How hard do rear wheels turn in opposit directions while on a lift? THANKS !

[Edward J.]

Re: C2 rear suspension / handleing problem

Stan, I truely don't know if you can over come the spring tension on the posi clutchs while the car is on lift and spinning wheels. Does the car act like what I said in my prev. post while you accel and decel? What does the car act like on tight turns in a parking lot?

[Dick W.]

Re: C2 rear suspension / handleing problem

Pay attention to Jerry's post, he has been there, done that, and got the tee shirt to prove it.