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

Rear Suspension

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Old Feb 8, 2022 | 05:44 PM
  #1  
Nick12's Avatar
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Rear Suspension

Is there anyone that can make a post like front suspension 101 the one at the top of suspension and chassis title, talking about rear suspension? Also if someone can inform me on what parts I can refurbish and what ones I should buy new?
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Old Feb 8, 2022 | 06:08 PM
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Rear Suspension

Buy new:
  • LCAs
  • Shocks
  • Springs
  • Sway bar bushings & end links
  • Panhard bar

Have done by competent welder (if you're not):
  • LCARBs

Takes nearly as long to jack the car up and let it back down as it does to change out those parts. Except of course for the welding. And of course, dealing with any rusted-up frozen hardware, and repairing the upper shock mounts if they're punched out of the sheet metal.

Not much of a sticky, but then, it's not much work or danger or $$$ either.
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Old Feb 9, 2022 | 09:06 PM
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Car: 1988 Trans Am
Engine: L03
Transmission: 700R4
Axle/Gears: 10 Bolt 2.73 Open
Re: Rear Suspension

Originally Posted by sofakingdom
...and repairing the upper shock mounts if they're punched out of the sheet metal.
Ouch. I've never heard of that one on these cars. What causes that, and is there a way (reinforcement) to prevent it?
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Old Feb 10, 2022 | 08:15 AM
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Re: Rear Suspension

Happens to all of em sooner or later. Mine lasted until about 250k miles, when it started making a strange banging noise behind the rear seat on one side when going over bumps, and seemed like the shock on that side wasn't doing anything. Popped the seat out and pulled back the carpet to change out the shocks, and found that. The other side wasn't far from doing the same thing.

I had somebody weld acoupla big washers in place of the sheet metal that had broken out. Then finished putting the new shocks in.

What causes it is, poor design. The shock is mounted to a flat place stamped in the sheet metal, and as it does its job damping the car's (and axle's) bouncing motions, it flexes the sheet metal. Sooner or later the metal fatigues.

Take a look. Yours might already be that way and you don't even know it.
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Old Feb 10, 2022 | 01:46 PM
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Engine: L03
Transmission: 700R4
Axle/Gears: 10 Bolt 2.73 Open
Re: Rear Suspension

I will check it out. Thank for the info. I'm hoping that at 58k easy miles, it's still fairly sound. But it might be a place to think about reinforcing when I put in new rear shock.
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Old Feb 10, 2022 | 08:05 PM
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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: Rear Suspension

Yep, they're cheap-a$s POS cars, but we love 'em...
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