Rear suspension feels loose
Thread Starter
Joined: Nov 1999
Posts: 1,790
Likes: 22
From: Monroe,NC
Car: 90 Formula
Engine: 305
Transmission: 700R4
Axle/Gears: 9 bolt/3.27
Rear suspension feels loose
Even with Lakewood control arms,adjustable panhard bar,Spohn adjustable torque arm,LCA relocator brackets,Eibach springs and poly bushings the rear feels loose at times during driving. Everything is tight when checked and I'm at a loss as to why it feels like this. Any thoughts?
Senior Member
Joined: Dec 1999
Posts: 954
Likes: 1
From: Annandale, VA
Car: 1991 Formula Firebird
Engine: 2001 LS1 Modded
Transmission: 2001 4L60E Yank SS3600 TC
Did you replace all the bushings? On my 87 I had a wandering feeling. It turned out to be a worn rear control/trainling arm bushing. What kind of shape is the frame in?
BILL
BILL
Supreme Member
Joined: Nov 2001
Posts: 1,160
Likes: 0
From: So. California
Car: 91 Camaro RS
Engine: 305 TBI
Transmission: Pro-Built Automatic/Vigilante 2800
Yeah that's my first question, do you have sub-frame connectors installed? I don't have all the mods you have but one of the first things I did with my car was to rebuild the front end with poly components leaving the back stock. Soon after I realized that I was going to have to do the backs also because having the front so stiffer than the rear made the back end feel much more loose. Now that all rubber has been replaced the car is a little stiffer but still loose and I think it's mainly due to the fact that I don't have sub-frame connectors installed yet.
Thread Starter
Joined: Nov 1999
Posts: 1,790
Likes: 22
From: Monroe,NC
Car: 90 Formula
Engine: 305
Transmission: 700R4
Axle/Gears: 9 bolt/3.27
Check my sig. I have Southside Machine subframe connectors and yes,the bushings are all polyurethane. The car has never been wrecked. This I am certain of since I bought the car new.
What size wheels do you have in the back if they are 15s there is your problem. I know most of the formula's came with 16s but I am no expert. The performance differance between 15s and 16s is a great ammount. What type of tires do you have? A tire with a soft sidewall or a tire with low air preasure will make the same symthoms you have described.
Thread Starter
Joined: Nov 1999
Posts: 1,790
Likes: 22
From: Monroe,NC
Car: 90 Formula
Engine: 305
Transmission: 700R4
Axle/Gears: 9 bolt/3.27
I'm using the stock 16" Formula wheels with Sumitomo HTRZ tires size 245/50ZR16. I run the tire pressure at 35 psi.
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