Transmissions and Drivetrain Need help with your trans? Problems with your axle?

9 bolt gears

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Old Feb 18, 2014 | 06:42 AM
  #1  
scoflaw's Avatar
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From: cape cod ma
Car: 1988 gta
Engine: 383
Transmission: 700r4
Axle/Gears: 9 bolt 3:23
9 bolt gears

Will gears from anything else fit my 3 series 9 bolt?
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Old Feb 18, 2014 | 06:45 AM
  #2  
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Re: 9 bolt gears

Sure...

Any from any other 3 series 9-bolt. Or of course, from the store. No problem.

Then all you have to do, is find all the bearings & seals.
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Old Feb 18, 2014 | 07:11 AM
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Re: 9 bolt gears

Randy's Rng & Pinion has 9 bolt parts and installation kts.
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Old Feb 18, 2014 | 09:40 AM
  #4  
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From: cape cod ma
Car: 1988 gta
Engine: 383
Transmission: 700r4
Axle/Gears: 9 bolt 3:23
Re: 9 bolt gears

So, no other GM application will work for me?
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Old Feb 18, 2014 | 11:38 AM
  #5  
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Car: 1987 Black IROC-Z (SOLD)
Re: 9 bolt gears

Originally Posted by scoflaw
So, no other GM application will work for me?

...See answer above.
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Old Feb 18, 2014 | 11:43 AM
  #6  
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From: SW Ohio
Car: 1989 IROC-Z28
Engine: L98 - 350 TPI
Transmission: MD8 - 700R4
Axle/Gears: GH3/G80 - 2.77 POSI
Bunch of smart asses. Lol.

Pretty much any 9 bolt gear will fit your carrier. It's the 2 series ones that suck. Only 2.77 and 3.08 fit 2 series. You can order pretty much any other ratio for 3 series. I went with 3.70s of course I had to replace my 2 series with a 3. I think you can get all the way up to like 4.30s...
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Old Feb 18, 2014 | 04:35 PM
  #7  
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Re: 9 bolt gears

Rear end parts don't interchange. 9 bolt parts ONLY fit 9 bolt rear ends, 7.5 10 bolt parts ONLY fit 7.5 10 bolt rear ends, 12 bolt parts ONLY fit 12 bolt rear ends...
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Old Feb 18, 2014 | 08:14 PM
  #8  
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From: SW Ohio
Car: 1989 IROC-Z28
Engine: L98 - 350 TPI
Transmission: MD8 - 700R4
Axle/Gears: GH3/G80 - 2.77 POSI
Originally Posted by big gear head
Rear end parts don't interchange. 9 bolt parts ONLY fit 9 bolt rear ends, 7.5 10 bolt parts ONLY fit 7.5 10 bolt rear ends, 12 bolt parts ONLY fit 12 bolt rear ends...
Correct. OP, if you have a 9 bolt 3 series carrier there are a lot of 9 bolt 3 series carrier options. Just look. I got my Motive 3.70s with install kit from Hawks Third Gen.
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Old Feb 18, 2014 | 08:45 PM
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Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: 9 bolt gears

The particular seal that seems to be a problem is one of the axle seals. Be REAL cautious about the idea of pulling the axles unless you already have both sides in your hand. (they're different... don't ask me why somebody thought THAT was A Good Idea...)
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