Transmissions and Drivetrain Need help with your trans? Problems with your axle?

86 rear disc

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Old Sep 12, 2007 | 02:22 PM
  #1  
adam86's Avatar
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From: Modesto, CA
Car: 1989 GTA
Engine: 305 TPI
Transmission: Stock 700r4
Axle/Gears: 3.08 POSI
86 rear disc

i read something about adjusting the rear disc brakes on the main page but i dont realy understand it...

i swapped a posi rear with disc brakes on my car recently and the brake pad doesnt seem to contact the rotor as much as it should..

IS this because my brakes are not adjusted?


i read that i need the parking brake to adjust them but one of my parking brake cables came loose and dragged on the floor till the ball on the tip of the cable ground off and not i dont have an e-brake..

IS the e-brake needed for the adjustment?
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Old Sep 13, 2007 | 10:07 PM
  #2  
Jim Berry's Avatar
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Joined: May 2001
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From: San Antonio, Texas
Car: '86 Trans Am
Engine: LG4
Transmission: 700R4
Axle/Gears: 3.70 Posi disc 9 bolt
Re: 86 rear disc

Did you replace drum brakes before adding the disc rear end? If so you also should have grabbed the brake proportioning valve body found below the brake fliud holder on the brake booster pump. That might make a difference on the amount of fluid that is being pushed to the rear brakes.

Jim.
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Old Sep 14, 2007 | 04:31 AM
  #3  
L69norm's Avatar
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Re: 86 rear disc

Originally Posted by adam86
...i read that i need the parking brake to adjust them ...IS the e-brake needed for the adjustment?
you need to hook the parking brake up. In the meantime, manually rotate the lever on the calipers back and forth a few times to ratchet the piston outwards to take up the slack.

The lever is only suppose to ratchet the piston outwards. If the piston moves outwards and then back inwards with the lever, then the adjuster is seized and you should replace the caliper.
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