9 Bolt BW on a early build 90 G92 5-spd ?
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From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
Re: 9 Bolt BW on a early build 90 G92 5-spd ?
I have a friend who bought a Dana 44 from I believe GM back in the day. IDK if they ever used them as a service part.
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Joined: Aug 2007
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From: Indiana
Car: 85 Z28/87 IROC-Z/92 B4C
Engine: Twin turbo LS9/SC LS9/L98
Transmission: RPM T56/T56 Magnum/700R4
Axle/Gears: 9"/Dana 44/10 bolt
Re: 9 Bolt BW on a early build 90 G92 5-spd ?
I was speaking with Mike (Cam Arrow) Im not sure if that's his screen name here) about this a while back. My boss had a 92 Z03 Z28 years ago that had a 9 bolt in it and I have seen 2 other 90 IROCs with 9 bolts in them. He said it was a performance axle option. I had never heard of this but he has forgotten more about 3rd gens than I will ever know.
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From: Florida
Car: 87 IROC-Z, 82 Pace Car
Re: 9 Bolt BW on a early build 90 G92 5-spd ?
The 9 bolt was the performance axle, but it's use ended in 1989 to early 1990. As this thread is explaining, many 1990 cars have the RPO for the 10 bolt, but actually have the 9 bolt. It was explained as a possible warranty replacement on grenaded 10 bolts, but the 500 mile car having a 9 bolt, while coded for a 10 bolt, throws all of that into question.
I don't believe the same would be true for a 1992 Z03 car as the surplus inventory would have already been used up by then. Your boss' car probably had the better 9 bolt swapped in at some time in the earlier years.
I don't believe the same would be true for a 1992 Z03 car as the surplus inventory would have already been used up by then. Your boss' car probably had the better 9 bolt swapped in at some time in the earlier years.
Junior Member
Joined: Aug 2007
Posts: 77
Likes: 51
From: Indiana
Car: 85 Z28/87 IROC-Z/92 B4C
Engine: Twin turbo LS9/SC LS9/L98
Transmission: RPM T56/T56 Magnum/700R4
Axle/Gears: 9"/Dana 44/10 bolt
Re: 9 Bolt BW on a early build 90 G92 5-spd ?
The 9 bolt was the performance axle, but it's use ended in 1989 to early 1990. As this thread is explaining, many 1990 cars have the RPO for the 10 bolt, but actually have the 9 bolt. It was explained as a possible warranty replacement on grenaded 10 bolts, but the 500 mile car having a 9 bolt, while coded for a 10 bolt, throws all of that into question.
I don't believe the same would be true for a 1992 Z03 car as the surplus inventory would have already been used up by then. Your boss' car probably had the better 9 bolt swapped in at some time in the earlier years.
I don't believe the same would be true for a 1992 Z03 car as the surplus inventory would have already been used up by then. Your boss' car probably had the better 9 bolt swapped in at some time in the earlier years.
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