Whats involved in 12 bolt conversion?
Thread Starter
Joined: Sep 1999
Posts: 1,496
Likes: 60
From: Danville, IN
Car: 1991 Camaro Z28
Engine: LS1
Transmission: 4L60E
Axle/Gears: Strange 12 Bolt, 3.42
Whats involved in 12 bolt conversion?
I'm planning on getting a Currie or Moser 12 bolt rear for my car soon. These rear ends are supposed to be a bolt in replacement but I've heard its not that easy. I was wondering what all is involved in the change. Any special tools required? Do the stock brakes fit(I have an 84 Camaro with rear drums)? Do you have to compress the rear springs to get the new rearend in place, if so how? I'm trying to figure out if I can do this with the tools I have or if I should try to get a shop to do it for me. Any help or suggestions is greatly appreciated.
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best 1/4 mile so far: 13.4 @ 101mph
84 Camaro 305 ported & milled heads, 3 angle valve job, Edelbrock Performer RPM intake, Hedman full length headers, Accell ignition, Crane 274H cam, B&M 700R-4, 3000 stall speed, 4.10 gear,
M/T ET street tires
visit my website at http://www.geocities.com/jbenge/page1.html
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best 1/4 mile so far: 13.4 @ 101mph
84 Camaro 305 ported & milled heads, 3 angle valve job, Edelbrock Performer RPM intake, Hedman full length headers, Accell ignition, Crane 274H cam, B&M 700R-4, 3000 stall speed, 4.10 gear,
M/T ET street tires
visit my website at http://www.geocities.com/jbenge/page1.html
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
I am certain that all you need to compress the springs is a floor jack under the axle.
The other questions would best be asked of Currie or Moser.
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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam and intake, World 305 heads, Hooker headers & y-pipe, 3" Catco cat & 3" cat-back).
57 Bel Air, my 1st car. 0.030 over 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlock header mufflers, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1/94.6 @ 5800' Bandimere.
The other questions would best be asked of Currie or Moser.
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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam and intake, World 305 heads, Hooker headers & y-pipe, 3" Catco cat & 3" cat-back).
57 Bel Air, my 1st car. 0.030 over 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlock header mufflers, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1/94.6 @ 5800' Bandimere.
If it's supposed to be a direct bolt in I would say you can definitely do it with regular tools. You shouldn't have to compress the springs to put it in because all the connections that hold the rear end in are extendable to allow for travel in the suspension. You can do it. I swapped out a 10 bolt by myself and if it's a bolt in it should be just about the same. As for the brakes, I have no idea. Sorry.
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88 firebird formula
350 Vortec TBI
214int/224exh, .471int/.491exh
Edelbrock headers
T56 - SIX-speed
open 3.73's
2 1/4 stock catback
I love pissing those LS1's off
My Formula
All your base are belong to us.
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88 firebird formula
350 Vortec TBI
214int/224exh, .471int/.491exh
Edelbrock headers
T56 - SIX-speed
open 3.73's
2 1/4 stock catback
I love pissing those LS1's off

My Formula
All your base are belong to us.
Thread Starter
Joined: Sep 1999
Posts: 1,496
Likes: 60
From: Danville, IN
Car: 1991 Camaro Z28
Engine: LS1
Transmission: 4L60E
Axle/Gears: Strange 12 Bolt, 3.42
Thanks for the help, it doesn't sound too bad. I just need call Moser and see what I need to do about the brakes.
------------------
best 1/4 mile so far: 13.4 @ 101mph
84 Camaro 305 ported & milled heads, 3 angle valve job, Edelbrock Performer RPM intake, Hedman full length headers, Accell ignition, Crane 274H cam, B&M 700R-4, 3000 stall speed, 4.10 gear,
M/T ET street tires
visit my website at http://www.geocities.com/jbenge/page1.html
------------------
best 1/4 mile so far: 13.4 @ 101mph
84 Camaro 305 ported & milled heads, 3 angle valve job, Edelbrock Performer RPM intake, Hedman full length headers, Accell ignition, Crane 274H cam, B&M 700R-4, 3000 stall speed, 4.10 gear,
M/T ET street tires
visit my website at http://www.geocities.com/jbenge/page1.html
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