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

What type of rearend came on a 86 IROC posi???

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Old Feb 21, 2003 | 04:26 PM
  #1  
IROCME's Avatar
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Joined: May 2001
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From: N/a
Car: 1986 IROCZ
Engine: LB9....rebuilding coming soon
Transmission: rebuilt 700R4
What type of rearend came on a 86 IROC posi???

I am getting new gears and need to know:hail: 342s
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Old Feb 22, 2003 | 01:42 AM
  #2  
biff85ta's Avatar
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From: Glasgow Kentucky
Car: 04 Vette
Engine: LS1
Transmission: 4L60E
Axle/Gears: 2.73
If it has a rubber plug in the inspection cover it is a 9-bolt if not it`s a ten bolt.
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Old Feb 22, 2003 | 06:55 AM
  #3  
Riley's35089rs+'s Avatar
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From: heartland
Car: 89rs (previous 2.8)
Engine: 406
Transmission: 700r4 (for now)
uh ...count the bolts in the inspection plate.....plugs can be and are swapped very easily..
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Old Feb 22, 2003 | 12:28 PM
  #4  
Morley's Avatar
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'86 came with the weak Saginaw 10 bolt. If it is a posi rear and was never replaced, you are living on borrowed time.
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