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87, 88, 89 Ten-Bolt Owners, Come In

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Old 11-03-2010, 06:20 AM
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Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
87, 88, 89 Ten-Bolt Owners, Come In

If you have OE rear disc brakes in the above years, please post the year and model of your car. Many thanks.

JamesC
Old 11-15-2010, 08:35 PM
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Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: 87, 88, 89 Ten-Bolt Owners, Come In

TT.

JamesC
Old 02-16-2011, 11:31 AM
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Car: 86 sport coupe, 89 IROC-Z
Engine: 5.7 TPI, 5.0 TPI
Transmission: T-5, T-5
Axle/Gears: drum posi 3.73, disc open 2.73
Re: 87, 88, 89 Ten-Bolt Owners, Come In

1989 iroc, t5, 5.0 tpi. Has a 7.5" I think. Anyone know if these rotors brackets can be swapped to a drum axle? Trying to change my ratio from 2.73 wout tossing the discs.
Old 02-16-2011, 11:37 AM
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Join Date: Aug 1999
Location: Lawrence, KS
Posts: 19,282
Received 93 Likes on 68 Posts
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: 87, 88, 89 Ten-Bolt Owners, Come In

Originally Posted by scooted45
1989 iroc, t5, 5.0 tpi. Has a 7.5" I think. Anyone know if these rotors brackets can be swapped to a drum axle? Trying to change my ratio from 2.73 wout tossing the discs.
An 89 (7.6) with discs should be a 9-bolt with PBR's. Check the following link toward the end for more info on the swap:

https://www.thirdgen.org/forums/tran...-10-bolts.html

JamesC
Old 02-16-2011, 01:10 PM
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Car: 86 sport coupe, 89 IROC-Z
Engine: 5.7 TPI, 5.0 TPI
Transmission: T-5, T-5
Axle/Gears: drum posi 3.73, disc open 2.73
Re: 87, 88, 89 Ten-Bolt Owners, Come In

No, sorry to hijack the thread, Ive got the delco moraine style ambidextrous iron calipers. I bought a rebuild kit once and found that my car was supposed to have pbrs. Ive already read the link you cited and found a drum flange needs to be swapped with a disc flange. Is that correct?
Old 02-16-2011, 01:13 PM
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Posts: 80
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Car: 86 sport coupe, 89 IROC-Z
Engine: 5.7 TPI, 5.0 TPI
Transmission: T-5, T-5
Axle/Gears: drum posi 3.73, disc open 2.73
Re: 87, 88, 89 Ten-Bolt Owners, Come In

Maybe it is a 9 bolt. it has a filler cap on the diff. Sorry, thought it was a 10 bolt.
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