Rear Spring indexing
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Junior Member
Joined: Jul 2004
Posts: 83
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From: Columbus, Ohio
Car: 1989 IROC-Z
Engine: 5.7L TPI
Transmission: 700R4
Rear Spring indexing
Just wanted to get this straight. I've seen a few posts about indexing the rear coil spring during a replacement. The top of the spring seats into the insulator and the end of the coil goes towards the rear of the car??? I'm asking because my eibach replacement left me with a higher rear than before. I was expecting it to be much lower but definitely wasn't expecting it to be higher...
Thread Starter
Junior Member
Joined: Jul 2004
Posts: 83
Likes: 0
From: Columbus, Ohio
Car: 1989 IROC-Z
Engine: 5.7L TPI
Transmission: 700R4
FROM: 83 Crossfire TA
Going to try it...
Don’t worry about the bottom pigtails (although they will probably end up in the same spot anyway), the top pockets are not quite flat to the axis of the spring, just put the ends of the to top coils facing the same way. Usually, with the ends of the top coils towards the back the rear of the car will sit a little lower (1/2”) then they will with them towards the front of the spring pocket, and to either side is usually someplace in the middle.
Joined: Feb 2001
Posts: 13,756
Likes: 560
From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Indexing the rear springs isn't as crutial as it is on the fronts. I have had my rear springs in six ways from sunday and the rear height never really changes. I just really make sure they are seated in the isolator and then somewhat flush/flat against the axle mounts.
Thread Starter
Junior Member
Joined: Jul 2004
Posts: 83
Likes: 0
From: Columbus, Ohio
Car: 1989 IROC-Z
Engine: 5.7L TPI
Transmission: 700R4
Indexed the springs, top of coil towards the back of the car and made sure they were properly seated in the insulators.
Driver rear: 27 1/2"
Passenger rear: 27 1/2"
No change!!!
Oh well, hopefully the rear will settle a little after driving it...
Driver rear: 27 1/2"
Passenger rear: 27 1/2"
No change!!!
Oh well, hopefully the rear will settle a little after driving it...
Joined: Feb 2001
Posts: 13,756
Likes: 560
From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Originally posted by l98-tpi-guy
will settle a little after driving it...
will settle a little after driving it...
Last edited by ShiftyCapone; Jul 25, 2005 at 10:04 PM.
Thread Starter
Junior Member
Joined: Jul 2004
Posts: 83
Likes: 0
From: Columbus, Ohio
Car: 1989 IROC-Z
Engine: 5.7L TPI
Transmission: 700R4
Thanks Shifty...
It's good for now but I'm considering cutting some of the coil when the weather cools down. Working in the garage when the heat index is @ 101 sucks...
It's good for now but I'm considering cutting some of the coil when the weather cools down. Working in the garage when the heat index is @ 101 sucks...
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Senior Member
Joined: Feb 2004
Posts: 542
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From: Lowell, MA
Car: 91 Formula, 95 GT
Engine: 5.7, 5.0
Transmission: T5, T5
Axle/Gears: 3.42:1, ???
Yeah, Eibach Pro-Kit sits pretty high in the rear. I was going to try and move them around to see if it would drop any, I guess I don't have to now. 
disapointed. It has been sugested to remove the rear isolators altogether, that would lower it a good inch. But I'm not to keen on that idea. I would also rather not cut my new springs. I think I might cut my stock rear WS6 springs, they seemed stiffer than the rear Eibachs anyways. I'm not sure if I like the progressive rates in the rear either.
disapointed. It has been sugested to remove the rear isolators altogether, that would lower it a good inch. But I'm not to keen on that idea. I would also rather not cut my new springs. I think I might cut my stock rear WS6 springs, they seemed stiffer than the rear Eibachs anyways. I'm not sure if I like the progressive rates in the rear either. 
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