89 - 9 bolt or 4th Gen 10bolt
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Joined: Jan 2001
Posts: 103
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From: Miami Fl USA
Car: Iroc-Z
Engine: TPI 305
Transmission: T5
Axle/Gears: 3.27
89 - 9 bolt or 4th Gen 10bolt
I'm replacing my aluminum drum rear and I have the following options both are about the same price.
1989 9 bolt with 3:45 gears (PBR Calipers) or 1998 & newer 10 bolt probably 3:23 gears.
I wanted the 9 bolt, but after reading plenty of information I'm concerned with the durability and availability of parts for service.
Any advice and experiences with the 9 bolt will be appreciated. Also if there is any way to check the condition of the rear (out of car) The car is been prep for autocross.
Thanks,
1989 9 bolt with 3:45 gears (PBR Calipers) or 1998 & newer 10 bolt probably 3:23 gears.
I wanted the 9 bolt, but after reading plenty of information I'm concerned with the durability and availability of parts for service.
Any advice and experiences with the 9 bolt will be appreciated. Also if there is any way to check the condition of the rear (out of car) The car is been prep for autocross.
Thanks,
Junior Member
Joined: Dec 2012
Posts: 8
Likes: 0
From: Mass
Car: 1986 IROC Z28 & 1990 Pontiac
Engine: Chevy 350 10.5:1 good wrench block
Transmission: WC T5 short shifter
Axle/Gears: Borg warner 9 bolt 2:77
Re: 89 - 9 bolt or 4th Gen 10bolt
It's not a durability problem with the 9 bolt and with minimal searching on google I have found all the parts for mine but they are a bit pricey and don't forget the 4th gen rear is wider so depending on you wheel and tire combo it won't fit
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