OK, after getting totally pissed and letting the GN sit for over 2 months without even caring to start it, let alone drive it, I have finally calmed down enough to attempt to try AGAIN to see what my problem might be. I thought I'd try asking again for suggestions on here for WHERE to look to solve this problem. I know there are plenty of guru's on here so I'm hoping SOMEONE can come up with a solution.
The problem is---- if I roll away from a stop and at about 15-20 MPH I give it about 1/2 to 3/4 throttle (no way flooring it), the back end breaks loose and I'm immediately looking at 2:00 and have to let off to straighten out the car. I can't even try to race a Honda across the intersection let alone anything serious because I go sideways.
About 2 months ago I spent over $600 to get a new H&R rear bar installed and had all the rear suspension components thoroughly checked out. I was told this would fix my problem but it didn't. Just to be clear, it was doing this before we installed the H&R bar.
Here are the specs.
low 11, high 10 sec 87 GN - see signature for specs.
Stock posi rear end, rebuilt less than 4000 miles ago
New H&R rear bar - set up with neutral preload as instructions suggest
Boxed stock upper control arms with stock rubber bushings
Aftermarket lower control arms (like Southsides but not) with poly bushings and grease fittings in each end.
Monroe stock type shocks
Aftermarket rear springs that Kirban sold many years ago
2 rear air bags but no air in them
Tires are 275-60 15 Nitto drag radials. They still have good tread on them but are about 6 years old - about 24 psi I think
All body bushings replaced including adding the GNX bushings over rear end
Pinion snubber
Front bar still on and years ago added the cross braces under radiator
Rear seat cross braces
Battery relocated into spare tire well
I'm looking for suggestions but I have a hard time thinking that changing the brand of shocks or lower control arms, etc will solve the problem. I was told the H&R bar would make it go straight but it didn't.
I am assuming I go sideways because both tires are not gripping equally. I don't think I have a rear axle that is shifting all over the place. Flipping to the right as hard and quick as it does makes me think it HAS to be because of unequal traction.
I can't figure this out but if it is immediately spinning to the right, which tire is gripping and which is spinning? Drivers side grips and pulls that side forward?? I have so much torque at part throttle that there is no way on the street to keep the tires from spinning but it sure seems to me that one of them is spinning a lot while the other is gripping.
Here is the only thing I can think of as a possible problem. The guy that rebuilt my posi years ago was a serious drag racer. He said he put an extra disk or 2 in the posi clutch pack to make it grip tighter. Is there a possibility that it is so tight that it isn't working properly and locks up one side and not the other?
We adjusted the H&R bar neutral like instructions said. Should we try pre-loading it or putting air in the passenger rear air bag?
All suggestions appreciated.
T
The problem is---- if I roll away from a stop and at about 15-20 MPH I give it about 1/2 to 3/4 throttle (no way flooring it), the back end breaks loose and I'm immediately looking at 2:00 and have to let off to straighten out the car. I can't even try to race a Honda across the intersection let alone anything serious because I go sideways.
About 2 months ago I spent over $600 to get a new H&R rear bar installed and had all the rear suspension components thoroughly checked out. I was told this would fix my problem but it didn't. Just to be clear, it was doing this before we installed the H&R bar.
Here are the specs.
low 11, high 10 sec 87 GN - see signature for specs.
Stock posi rear end, rebuilt less than 4000 miles ago
New H&R rear bar - set up with neutral preload as instructions suggest
Boxed stock upper control arms with stock rubber bushings
Aftermarket lower control arms (like Southsides but not) with poly bushings and grease fittings in each end.
Monroe stock type shocks
Aftermarket rear springs that Kirban sold many years ago
2 rear air bags but no air in them
Tires are 275-60 15 Nitto drag radials. They still have good tread on them but are about 6 years old - about 24 psi I think
All body bushings replaced including adding the GNX bushings over rear end
Pinion snubber
Front bar still on and years ago added the cross braces under radiator
Rear seat cross braces
Battery relocated into spare tire well
I'm looking for suggestions but I have a hard time thinking that changing the brand of shocks or lower control arms, etc will solve the problem. I was told the H&R bar would make it go straight but it didn't.
I am assuming I go sideways because both tires are not gripping equally. I don't think I have a rear axle that is shifting all over the place. Flipping to the right as hard and quick as it does makes me think it HAS to be because of unequal traction.
I can't figure this out but if it is immediately spinning to the right, which tire is gripping and which is spinning? Drivers side grips and pulls that side forward?? I have so much torque at part throttle that there is no way on the street to keep the tires from spinning but it sure seems to me that one of them is spinning a lot while the other is gripping.
Here is the only thing I can think of as a possible problem. The guy that rebuilt my posi years ago was a serious drag racer. He said he put an extra disk or 2 in the posi clutch pack to make it grip tighter. Is there a possibility that it is so tight that it isn't working properly and locks up one side and not the other?
We adjusted the H&R bar neutral like instructions said. Should we try pre-loading it or putting air in the passenger rear air bag?
All suggestions appreciated.
T
Its the combination of the two if you were hooking it wouldnt be as bad but at the same time spinnin in a str8 line is always better than doin donuts
