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Old 07-21-2009, 09:14 AM   #1
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Join Date: May 2009
Location: New York
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Car: 88' GTA with 19k on it.
Engine: 305 TPI WS6 Ram Air
Transmission: Automatic
Axle/Gears: 3:27 9 bolt aussie

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Need a 10 bolt rear for 88 GTA 305'

I want to swap out my 3:27 gear ratio for 3:73, I have the rat 9 bolt, gotta swap the rears with a 10 bolt from a camaro 88 only I believe. Any suggestions?
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Old 07-21-2009, 09:26 AM   #2
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Location: Lawrence, KS
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Car: Met. Silver 85 IROC
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's

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Re: Need a 10 bolt rear for 88 GTA 305'

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Originally Posted by Dacman88GTA View Post
I want to swap out my 3:27 gear ratio for 3:73, I have the rat 9 bolt, gotta swap the rears with a 10 bolt from a camaro 88 only I believe. Any suggestions?
As I understand it, gears between a 9- and 10-bolt won't swap.

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Old 07-21-2009, 10:47 AM   #3
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Join Date: May 2009
Location: New York
Posts: 8
Car: 88' GTA with 19k on it.
Engine: 305 TPI WS6 Ram Air
Transmission: Automatic
Axle/Gears: 3:27 9 bolt aussie

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Re: Need a 10 bolt rear for 88 GTA 305'

Quote:
Originally Posted by JamesC View Post
As I understand it, gears between a 9- and 10-bolt won't swap.

JamesC

That's right, they won"t, so the only way to upgrade the gear ratio is to change out the complete rear correct? I am looking for a 10 bolt rear that can accept 3:73 gears,from another firebird or camaro, how am I doing?
thanks for any suggestions James.
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Old 07-21-2009, 12:03 PM   #4
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Join Date: Aug 1999
Location: Lawrence, KS
Posts: 16,248
Car: Met. Silver 85 IROC
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's

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Re: Need a 10 bolt rear for 88 GTA 305'

Quote:
Originally Posted by Dacman88GTA View Post
That's right, they won"t, so the only way to upgrade the gear ratio is to change out the complete rear correct? I am looking for a 10 bolt rear that can accept 3:73 gears,from another firebird or camaro, how am I doing?
Any thirdgen and/or fourthgen 10-bolt will work. Check the following FAQ for info that may be helpful:

http://www.thirdgen.org/techboard/tr...-10-bolts.html (FAQ About 10-Bolts)

JamesC
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Old 07-21-2009, 12:52 PM   #5
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Re: Need a 10 bolt rear for 88 GTA 305'

Why not just put a set of 3.70 gears in the 9 bolt?

I've got a disc brake 10 bolt that I could build if you are interested. It will need all new parts inside, but you would almost have a new rear end.
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Old 07-21-2009, 12:52 PM
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