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12 inch 98 pbr setup on 9 bolt.

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Old 05-06-2017, 12:34 PM
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Car: 1986 pontiac bonneville
Engine: LB9 305
Transmission: MK6 T5
Axle/Gears: 3.42
12 inch 98 pbr setup on 9 bolt.

ok folks I have some figuring to do, I just picked up a 1992 B4C/1LE camaro 5 speed currently has a bad 10 bolt from someone letting the fluid get low , so I got a deal on a 9 bolt rear with disc but the 1le backing plates will not fit the 9 bolt, so I grabbed a very nice 10 bolt with powerslot rotors and pads almost new and a auburn unit and the inside of the diff looks brand new, Id like to not have to deal with whole wheel adapter thing in the front and but able to run reg rims, I found a adapter on http://www.flynbye.com to install my stock 1LE brakes on the 9 bolt , but I would like to go with the full 12 inch rotor off the 98 rear. didnt really see that option listed on his site. any ideas?
Old 05-07-2017, 09:13 AM
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Car: 1986 pontiac bonneville
Engine: LB9 305
Transmission: MK6 T5
Axle/Gears: 3.42
Re: 12 inch 98 pbr setup on 9 bolt.

well after thinking about it, I might just get the adapter to use the stock 1LEs on the 9 bolt for now and run it while I swap the ring and pinion into my orginal 9 bolt and i'll get the kit to use the LS1 style ones on my original 10 bolt I have a thorson in my 92 B4C rear so I will wait till its rebuilt to run the 12 inch ones on it.
Old 05-07-2017, 09:26 AM
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Car: 82 TA 87 IZ L98 88 IZ LB9 88 IZ L98
Engine: 5.7TBI 5,7TPI 5.0TPI, 5,7TPI
Transmission: T5, 700R4, T5, 700R4
Axle/Gears: 3.08, 3.27, 3.45, 3.27
Re: 12 inch 98 pbr setup on 9 bolt.

The 12 inch vette rear rotor us only a hair larger than the 11.7? Stock rotor. Waste of money
Old 05-07-2017, 10:01 PM
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Join Date: Dec 2005
Location: Shelby,N.C.
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Car: 1986 pontiac bonneville
Engine: LB9 305
Transmission: MK6 T5
Axle/Gears: 3.42
Re: 12 inch 98 pbr setup on 9 bolt.

well when I got the newer 98 rear axle from the junkyard, the 98 beside it had brand new power slot rotors and a full set up founders tubuler control arms and panhard rods , so I swapped that stuff out for the stock stuff on the axle I bought cause it was 150 for the whole assy , so I have the compete rear axle from a 98 , so basically my brakes and control arms where free.




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