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7.5 Rear End Issues

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Old 10-29-2007, 11:09 AM
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65coupe88hatch
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Default 7.5 Rear End Issues

Ok so i know NOTHING about rear ends except that I have an 9 inch in my 65,8.8 in my gt and, 7.5 in my 88.
But anyways I decided to be a dumbass and did like donuts on saturday night and when i launched afterwards i heard a LOUD crack from the rear end...I stopped right up the road and took a look to see if anything was broken...didnt notice anything outta the ordinary. got back in it and took it easy everytime i get above 70 the car starts swaying like in the rear....and if i leave hard it feels to pull to one side...I dont know weither I broke something internally can anyone help me figure out what i did?
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Old 10-29-2007, 12:23 PM
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DesertMach
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Default RE: 7.5 Rear End Issues

Sounds more like you broke something in the rear suspention not the differentail.
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Old 10-29-2007, 01:04 PM
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65coupe88hatch
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Default RE: 7.5 Rear End Issues

like what?
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Old 10-29-2007, 01:27 PM
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DesertMach
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Default RE: 7.5 Rear End Issues

I am not sure what exactly happened but I had a simular problem with my truck, after reaching about 70 mph it would start to sway, I jacked up the truck and sure enough the ubolts holding the differentail to the leaf springs had come lose. I would just jack the car up on jack stands supported by the frame of the car not the rear end, then see if you can move the rear end side to side or front to back.

Granted your car is not the same as the truck was they theory and symptom are the same
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Old 10-29-2007, 02:40 PM
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65coupe88hatch
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Default RE: 7.5 Rear End Issues

Well I know my Ujoints prolly are shot but is that whats causing the problems, the bolts are tight.
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Old 10-29-2007, 03:40 PM
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Gary H
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Default RE: 7.5 Rear End Issues

Tight bolts on bad u-joints arentgoing to do anything to keep them together. And when they go you better hope it isnt the front one. As for the rear sway, maybe broken sway bar, maybe control arm or control arm bushings. Or you tore a torque box loose.
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Old 10-29-2007, 03:44 PM
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65coupe88hatch
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Default RE: 7.5 Rear End Issues

I took it for another ride and i went around a turn around 40 and i heard a loud crack and it thumped on and off coming back.....now im worried
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Old 10-29-2007, 10:28 PM
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Colorado_Mustang
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Default RE: 7.5 Rear End Issues

Jack up the rear and check the control arms. Sounds like you may have broken one. Now you see why the NASCAR mechanics hate it when the drivers do donuts after winning a race.
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Old 10-30-2007, 12:05 PM
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65coupe88hatch
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Default RE: 7.5 Rear End Issues

Update...I jacked the car up, and nothing!! i cant see anything wrong except i found out that my parking brake was f***ed up. But as for the rear end nothing seems to be broken, loose, nothing you think its internal?
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Old 10-30-2007, 01:30 PM
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Gary H
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Default RE: 7.5 Rear End Issues

Did you check the shocks and mounts?
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