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How do I know if I have a 9 or 10 bolt?

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Old Oct 23, 2009 | 01:13 PM
  #1  
whatever84's Avatar
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From: Ankeny Iowa
Car: 84 Camaro
Engine: 357
Transmission: TH350
Axle/Gears: 4.10's / Strange LSD
How do I know if I have a 9 or 10 bolt?

I searched and didn't come up with anything. I have a 84 Sport coupe with the 305 auto. I know it has the 3.08 gearset right now. But I'm going to order gears shortly. Is it as easy as counting the bolts on the cover? Thanks.

Mark.
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Old Oct 23, 2009 | 01:13 PM
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From: Kemah, Tx
Car: 1991 z28
Engine: Turbo 310
Transmission: T56
Axle/Gears: D44
Re: How do I know if I have a 9 or 10 bolt?

yep thats all you;ve gotta do
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Old Oct 23, 2009 | 01:49 PM
  #3  
whatever84's Avatar
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From: Ankeny Iowa
Car: 84 Camaro
Engine: 357
Transmission: TH350
Axle/Gears: 4.10's / Strange LSD
Re: How do I know if I have a 9 or 10 bolt?

Thanks!

Mark.
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Old Oct 23, 2009 | 02:34 PM
  #4  
JamesC's Avatar
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From: Lawrence, KS
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: How do I know if I have a 9 or 10 bolt?

An 84 should have a 10-bolt (barring a swap somewhere along the line, which is what I assume happened with the motor).

JamesC
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Old Oct 23, 2009 | 03:27 PM
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From: Rowlett, TX
Car: 1988 GTA
Engine: 5.0 TPI
Transmission: T5
Axle/Gears: 9 Bolt, 3.45
Re: How do I know if I have a 9 or 10 bolt?

Also, 9 bolts didn't come with 3.08 ratio in our cars, only 2.77, 3.27, and 3.45.
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Old Oct 23, 2009 | 03:32 PM
  #6  
whatever84's Avatar
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Joined: Oct 2009
Posts: 374
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From: Ankeny Iowa
Car: 84 Camaro
Engine: 357
Transmission: TH350
Axle/Gears: 4.10's / Strange LSD
Re: How do I know if I have a 9 or 10 bolt?

It was bone stock when I bought it a few weeks ago with the exception of the Dynomax cat back so I'm pretty sure it's a stock 3rd member. The 305/700r4 are on there way out . Thanks guy's!!

Mark.



PS. Opps, I guess I did read that the 9 bolts in our cars never came with 3.08's and just wasn't thinking when I posted this thread. Sorry.

Last edited by whatever84; Oct 23, 2009 at 03:35 PM.
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Old Oct 23, 2009 | 04:27 PM
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From: Bertram (outside Austin), TX
Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: How do I know if I have a 9 or 10 bolt?

Originally Posted by Ward
Also, 9 bolts didn't come with 3.08 ratio in our cars, only 2.77, 3.27, and 3.45.
Actually, 3.08 is the only # between a 9 & 10 bolt. From there (up & down), 9-bolts can be close, but not quite.

10 bolt & 9 bolt
2.73 & 2.77
3.08 & 3.08
3.23 & 3.27
3.73 & 3.7
Etc., etc.
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