Third Generation F-Body Message Boards - Suspension and Chassis

caster/camber plate removal question

grove — Sun, 17 May 2026 22:41:03 GMT

currently my car is sitting on the ground, weight on wheels, and engine/transmission removed. when changing out the camber plates in the cars current configuration, do I still have to jack the front up and put the jacks under the a arm? I confused on why jack it up and support the A arms, if its on the wheels. educate me please. if I can avoid jacking the car up, cool. if it has to be done then so be it. I'll do it.

Suspension upgrade

Joeype70 — Tue, 12 May 2026 02:27:21 GMT

Hi all,

Has anyone installed suspension upgrade kits on there IROC.....in my case 87. It does have the stock upgraded handling package but im wondering if there are better options and which brands. Thank you either way!!

Prothane Cobra rear spring isolators

exiled350 — Sun, 10 May 2026 19:37:19 GMT

For anyone who is curious or planning on changing their rear springs this is the stock isolator and the prothane 6-1709 for the new edge Cobra with IRS. Probably half an inch thinner overall than the originals.

UMI weight jacks

Thirdgenstudent — Sat, 09 May 2026 07:00:31 GMT

I recently purchased a set of front and rear UMI weight jacks for my 87 IROC along with the KYB AGX adjustable shocks and struts. After installing them the fronts turned out great. I got the car as low as I wanted and the ride was not harsh at all on bumpy Chicago land streets. The rears on the other hand were disappointing. The ride was harsh over bumps and when I would drive and park over a section of my slanted driveway I could hear a clunk in the rear coming from the shocks/springs-weight jacks??? I did go low with the car, is it possible it�s too low and I need to come up? I had the shocks set at 1 which is supposed to be the softest setting but it didn�t help? I will do some more inspecting but for the time being I suspect that it�s the weight jacks cup/plate that�s making contact with the rear end??? Is it possible that I went too low and I need to come up some? I did come up about a half inch and adjusted the shocks to 3 with no change. Has anyone else encountered this issue? The springs are the recommended 175lbs. Any advice? Do I have to settle for coilovers? Thanks in advance.

CPP Spindles

pirateofms — Wed, 06 May 2026 00:05:35 GMT

I came across this earlier, and was wondering if anyone had tried them or knew anything else about them. $500 for the pair, with hubs, seems like a steal.

https://classicperform.com/shop/8292sh-k

Steering Box Seepage/Leakage

walkingdead5 — Fri, 01 May 2026 22:20:01 GMT

Noticing some seepage in the form of droplets (3 can be seen here) on the underside of the steering box (91 RS). Suggestions to check? Guessing seals are going, but just wanted your take.... Thx!

Power steering pump question

SteveC68 — Sun, 26 Apr 2026 21:54:25 GMT

How easy/difficult should it be to spin a rebuilt power steering pump by hand? This is with it out of the car and no fluid inside. This is on a 1989 IROC.

Strut tower brace

Joeype70 — Sun, 26 Apr 2026 02:23:11 GMT

Good evening.

I've been looking at strut tower brace options for my 87 Iroc. Im look at the chrome one from Iroc Motorsports. My question is are these are good addition. What are the best options? Thank you!!!

Skoons Subframe

85Z28NOS — Sat, 25 Apr 2026 01:43:44 GMT

I recently picked up a Skoons subframe designed to work with C5 suspension, 5thgen center section for our cars. This looks very well built and thought out to work with factory components

rear sway bar end links

Jet A — Mon, 20 Apr 2026 20:06:44 GMT

ok my 87 firebird had no rear end link bushings left. It was just the bolt and washers left on both sides. I installed one side with no problems. I could even lift the end of sway bar up and down to get it all aligned just right. Put in the new link and torqued to 16 ft lbs. On the other side however the sway bar wouldn't budge. I put the new link on anyway and tightened but I don't think it was aligned properly because the bottom bushings started bulging beyond the washers. So, I loosened them back up and left it. Haven't been driving it since because i want to get it right.

My question is what is the correct way to install new links? Should I have removed or at least loosened the sway bar saddle bolts to free up the bar first to align the new links? That makes the most sense to me but just wanted to ask.

ALSO the reason I did them one side at a time is because the sway bar runs right there by the differential and that is where you are supposed to jack these cars up from what I've read to get jack stands in there but, there's no way to use jack stands on the axle tubes either because the sway bar is in the way.

So, if anyone has any tips I'd appreciate them. Thanks

p.s. the front links have no bushings either (both sides). I have the new ones but haven't gotten up there yet.

performance suspension 1985

labws6 — Mon, 20 Apr 2026 02:51:55 GMT

hi. new member here. 26 years ago i sold my 88 formula and yesterday i bought a trans am 1985 ws6 package. (dream comes true !!) and i was wondering why there is no suspension performance badge on passenger side dash board ? yes on spid it�s say�s ws6. and 16x8 wheels and bigger sway bar.
if the badge had been removed, it should have 3 small holes on dash. any idea ? thx (my buddy have a 85 trans am without ws6 and he got the badge on the dash)