Feels like rear axle shifts when accelerating quickly
02-18-2024, 06:55 PM
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Car: 1989 trans am gta
Engine: 5.7 350 crate
Transmission: Automatic
Axle/Gears: N/A
Feels like rear axle shifts when accelerating quickly
Hey guys I just bought my old 1989 trans am GTA back from a guy I sold it too a couple years ago. Before I sold it to him I noticed anytime I punched the gas or accelerated quickly it felt like the rear axle would shift backwards or something. I took it down the road yesterday and noticed it’s doing the same thing still. Does anyone have any ideas of what it could be or what I should look for as I am still learning about these cars. Thanks in advance!
02-18-2024, 07:18 PM
#2
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Feels like rear axle shifts when accelerating quickly
Torque arm bushing and/or transmission mount
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02-19-2024, 06:29 PM
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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: Feels like rear axle shifts when accelerating quickly
If you're feeling the rearend move, check the panhard bar and rear control arm bushings.
if it's a thud or bang in the console area, trans mount.
if it's a thud or bang in the console area, trans mount.
02-19-2024, 06:32 PM
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Car: 1989 trans am gta
Engine: 5.7 350 crate
Transmission: Automatic
Axle/Gears: N/A
Re: Feels like rear axle shifts when accelerating quickly
Just ordered sway bar bushings and a torque arm bushing. I checked them out and they are all shot. Thanks I’ll see how she feels after I throw them in.
02-19-2024, 06:58 PM
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Car: Yes
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Transmission: Sometimes
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Re: Feels like rear axle shifts when accelerating quickly
Trans mount is the thing that breaks the most. You pretty much have to take it out to do the TA bushing; even if it's not broke in half, which it most likely is, best to just go straight nuclear and launch a pre-emptive first strike on it.
02-20-2024, 10:02 AM
#7
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Re: Feels like rear axle shifts when accelerating quickly
The shop I had working on my '89 back in the early '10's could not for the life of themselves diagnose this for whatever reason. They sent it home 3 times with "Couldn't reproduce sound". I ended up having to sit in the car on the lift and recreate the sound for them.
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