Suspension and Chassis Questions about your suspension? Need chassis advice?

Anyone cut their sportlines?

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Old Aug 10, 2022 | 01:04 PM
  #1  
88BLKTransAmGTA's Avatar
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From: Arkansas
Car: 1988 Trans Am GTA
Engine: 5.7 L98
Transmission: 700R4
Axle/Gears: 3.77
Anyone cut their sportlines?

I have 4.0138 sportlines on my 88 and want it lower. I am wondering what experiences people have had cutting their sportlines. I replaced my front isolators with rubber tubing but kept the stock isolators in the back. I feel like I need to go down another inch all around.




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Old Aug 10, 2022 | 01:48 PM
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ShiftyCapone's Avatar
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From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Re: Anyone cut their sportlines?

Remove the rear isolators and see if that does it for you. For me it was too low and the ride was brutal. You can also look into weight jacks so you can dial in the height the way you want.
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Old Aug 10, 2022 | 02:40 PM
  #3  
T.L.'s Avatar
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From: Colorado USA
Car: '83 Firebird (T/A Clone)
Engine: 350 with L-69 components
Transmission: 700R-4, 2000 RPM stall converter
Axle/Gears: 10-bolt/3.73 ..
Re: Anyone cut their sportlines?

I think it looks perfect the way it is...
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Old Aug 10, 2022 | 08:00 PM
  #4  
88BLKTransAmGTA's Avatar
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Joined: Dec 2020
Posts: 224
Likes: 5
From: Arkansas
Car: 1988 Trans Am GTA
Engine: 5.7 L98
Transmission: 700R4
Axle/Gears: 3.77
Re: Anyone cut their sportlines?

For some reason my passenger side is half an inch taller than my driver side
ground to fender height is
Driver side front is 26 Driver side rear 27
Pass side front 26.5 Pass side rear 27.5
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Old Aug 11, 2022 | 10:29 AM
  #5  
ShiftyCapone's Avatar
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From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Re: Anyone cut their sportlines?

Originally Posted by 88BLKTransAmGTA
For some reason my passenger side is half an inch taller than my driver side
ground to fender height is
Driver side front is 26 Driver side rear 27
Pass side front 26.5 Pass side rear 27.5

I too have a height difference with my sportlines. I recently put the stock isolators back in and made sure they are rotated in the perch correctly. I should probably remeasure. I would make sure the springs are sitting in their perches correctly.
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Old Aug 31, 2022 | 07:34 PM
  #6  
Arctic White 91 RS's Avatar
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From: MidWest
Car: 91 RS/ 99 T/A/ 72 Vette/ 02 Z28
Engine: LSx/ Dart400
Transmission: M6/ M6/ TH400/ 4L60E
Axle/Gears: 4.10's / 3.08/ 2.73
Re: Anyone cut their sportlines?

Yes, we cut the front Eibach Sportlines for my 91 RS after the car was LS resto-mod'd. It looked like an airplane on take off the front sat so high. The shop cut ONE coil of the front springs. Stance was perfect 🥰

However, the car road harsher than ever and bottomed out. Scrapping was frequent. It was impossible to roll the car over an oil change pit without lifting up on the fenders.

Got a set of UMI weight jacks and raise car 1/2 an inch - perfect, no more issues to speak of.

I wouldn't more than half a coil if you cut.

Total disaster.

Last edited by Arctic White 91 RS; Sep 1, 2022 at 08:28 AM.
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Old Sep 1, 2022 | 07:31 AM
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Joined: Dec 2000
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From: Cincinnati,Ohio
Car: 1991 BandittII Firebird
Engine: 5.7 HSR
Transmission: 700R4
Axle/Gears: 3.27 9 bolt
Re: Anyone cut their sportlines?

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Old Sep 1, 2022 | 08:20 AM
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TTOP350's Avatar
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From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Anyone cut their sportlines?

Looks good as is, it will settle a little bit.
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Old Sep 7, 2022 | 09:58 PM
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From: Monroe,NC
Car: 90 Formula
Engine: 305
Transmission: 700R4
Axle/Gears: 9 bolt/3.27
Re: Anyone cut their sportlines?

I trimmed about 1/3 of a coil off the front to get the stance right on mine. No noticeable change in ride.
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