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How do i read my rpo codes?

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Old May 3, 2018 | 05:32 PM
  #1  
gordfc's Avatar
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From: Newfoundland Canada
Car: 1988 iroc-z
Engine: 5.0
Transmission: 5 speed
How do i read my rpo codes?

Hi all.. im at a loss trying to decode my rpo. Ive read some archives but my eyes glaze over. Can anyone tell me what gear ratio is in my 1988 iroc with 9 bolt rear? Thanks in advance.
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Old May 3, 2018 | 05:40 PM
  #2  
tealman92's Avatar
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From: Ontario, California
Car: 1992 Z28
Engine: 383
Transmission: 700R4
Re: How do i read my rpo codes?

Rpo GM3 3:45 gears
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Old May 3, 2018 | 05:41 PM
  #3  
tealman92's Avatar
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Joined: Mar 2002
Posts: 998
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From: Ontario, California
Car: 1992 Z28
Engine: 383
Transmission: 700R4
Re: How do i read my rpo codes?

Hardtop 305 tpi 5 speed manual car
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Old May 3, 2018 | 05:47 PM
  #4  
gordfc's Avatar
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From: Newfoundland Canada
Car: 1988 iroc-z
Engine: 5.0
Transmission: 5 speed
Re: How do i read my rpo codes?

Thank you very much. Some day ill figure out all the codes. Posi traction ? Seems like it anyways
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Old May 3, 2018 | 07:06 PM
  #5  
Bow_Tied's Avatar
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Joined: Apr 2009
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From: Ontario, Canada
Car: 1987 IROC-Z
Engine: L98 5.7L
Transmission: MD8 700R4
Axle/Gears: G80 GW6 3.27:1
Re: How do i read my rpo codes?

Originally Posted by gordfc
Thank you very much. Some day ill figure out all the codes. Posi traction ? Seems like it anyways
Do you have microsoft Excel on your computer? If so, pm me your email addy and I will email you a spread sheet you can type your codes into.
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Old May 3, 2018 | 08:07 PM
  #6  
tealman92's Avatar
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Joined: Mar 2002
Posts: 998
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From: Ontario, California
Car: 1992 Z28
Engine: 383
Transmission: 700R4
Re: How do i read my rpo codes?

Yes posi performance axle G80
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Old May 4, 2018 | 07:50 AM
  #7  
PurelyPMD's Avatar
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From: Newtown, CT
Car: 1987 IROC Original Owner
Engine: LB9
Transmission: M39 MM5
Axle/Gears: G80 G92 J65
Re: How do i read my rpo codes?

Here you go...only reason I was able to pull it is it's a Z49 Export model.
Attached Files
File Type: pdf
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Old May 4, 2018 | 08:15 AM
  #8  
gordfc's Avatar
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From: Newfoundland Canada
Car: 1988 iroc-z
Engine: 5.0
Transmission: 5 speed
Re: How do i read my rpo codes?

Wow. ... just wow. THANK YOU SO VERY MUCH. Thats perfect. Really appreciate it.
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Old May 4, 2018 | 12:24 PM
  #9  
PurelyPMD's Avatar
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Joined: Jan 2013
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From: Newtown, CT
Car: 1987 IROC Original Owner
Engine: LB9
Transmission: M39 MM5
Axle/Gears: G80 G92 J65
Re: How do i read my rpo codes?

You're welcome.
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