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

How to know if chassis is bad

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Old Feb 25, 2003 | 07:50 PM
  #1  
Matto'85TA's Avatar
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From: Eastpointe, MI
Car: 2001 Trans Am WS.6, 1985 Trans Am-RIP :,(
Engine: LS1, 305 TPI
Transmission: 4L60E, 700R-4
How to know if chassis is bad

How do I know if the chassis is bad/bent? What signs should I look for? My car has been in a accident before I bought it and I want to make sure the frame ain't screwed up.

Thanks,
Matt
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Old Feb 25, 2003 | 09:33 PM
  #2  
87daddyformula's Avatar
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From: I am all around you
Car: Formula
Engine: 5.0L
Transmission: 700R-4
I would suggest having a unibody repair expert look at it. Other than that I really don't know...maybe listen for strange sounds when cornering hard.
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Old Feb 25, 2003 | 09:39 PM
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92 zzz28's Avatar
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From: Jacksonville, NC
Car: Guess
Engine: Crazy 8
Transmission: So close to being a manual I can taste it
You could also try having a friend follow you while you drive and watch the car for obvious signs of chassis problems, like dog tracking. Collision shop would be the best place for diagnosis.
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Old Feb 25, 2003 | 10:51 PM
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No4NJunk's Avatar
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From: Greenville S.C.
Car: 87 Grand National
Engine: 3.8 SFI Turbo
Transmission: BRF 200R4
Set back and thrust angle (being positive or neg will cause dog tracking) alignment angles can clue you in to any problems. measure from the torque arm mounts in the rear cross chassis to the front subframe. Both diagonals should be the same length.
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Old Feb 26, 2003 | 05:42 PM
  #5  
Matto'85TA's Avatar
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From: Eastpointe, MI
Car: 2001 Trans Am WS.6, 1985 Trans Am-RIP :,(
Engine: LS1, 305 TPI
Transmission: 4L60E, 700R-4
Whats "dog tracking"? I'm going to go to a body shop eventually, sooner if the chassis is screwed.
Thanks for the replies.

Matt
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Old Feb 26, 2003 | 05:59 PM
  #6  
No4NJunk's Avatar
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From: Greenville S.C.
Car: 87 Grand National
Engine: 3.8 SFI Turbo
Transmission: BRF 200R4
Have you ever seen a car or truck (alot of vans have the problem) where the back was more to the right/left the the front going in a straight line?? That is dogtracking and its caused by an positive or negative thrust angle. Rear end collisions will cause this along with a misaligned rear if its independant. Solid rears can't be adjusted (toe & sometimes camber).
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Old Feb 26, 2003 | 06:13 PM
  #7  
Matto'85TA's Avatar
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From: Eastpointe, MI
Car: 2001 Trans Am WS.6, 1985 Trans Am-RIP :,(
Engine: LS1, 305 TPI
Transmission: 4L60E, 700R-4
Thanks. Duh I should have known that. O well.
The car looks like the possibilty of front collision, particularly bthe driverside. My fenders don't line up with the doors. The strut tower also looks dented, sort like it was hammered out. I posted on the body board. Heres the link: https://www.thirdgen.org/techbb2/sho...hreadid=163403

Thanks again.

Matt
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