How to find out what type rear end I have?
Thread Starter
Senior Member
Joined: Mar 2007
Posts: 576
Likes: 0
From: Norway
Car: 1987 Chevrolet Camaro SC
Engine: 305 TPI
Transmission: 700r4
Axle/Gears: 3.42
How to find out what type rear end I have?
Hi there..
I have a plan on changing my gears in my 87 Camaro Sport Coupe.
But how do I find out wich kind of rear end I have?
I know that the gears is 2.73 now on my car and I was thinking of changing in to 3.43 gears.
But to change the gears I need to know if it is a GM7,5" or 8,5" or higher??...How to find that out?...Serial number mayby?
I have a plan on changing my gears in my 87 Camaro Sport Coupe.
But how do I find out wich kind of rear end I have?
I know that the gears is 2.73 now on my car and I was thinking of changing in to 3.43 gears.
But to change the gears I need to know if it is a GM7,5" or 8,5" or higher??...How to find that out?...Serial number mayby?
Junior Member
Joined: Jan 2006
Posts: 20
Likes: 0
From: schiedam, netherlands
Car: T/A
Engine: 5.0 v8 TPI
Re: How to find out what type rear end I have?
I think the best place to start is to count the bolts.
If you have 9 bolts, you've got a Borg-Warner, if you have 10, you've got a GM. Both need completely different parts.
If you are sure you have a 2.73 ratio, you probably have a GM.
If you have 9 bolts, you've got a Borg-Warner, if you have 10, you've got a GM. Both need completely different parts.
If you are sure you have a 2.73 ratio, you probably have a GM.
Last edited by phoxetis; Jun 19, 2008 at 05:57 AM.
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: How to find out what type rear end I have?
JamesC
Moderator
Joined: Jul 1999
Posts: 17,265
Likes: 168
From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: How to find out what type rear end I have?
In 87, only the IROC-Z cars had the 9 bolt option. All the other models had the 7.5" 10 bolt.
According to the TGO data list, the 87 Camaro SC only came with a V6 which has 3.42 gears. All the other A4 cars have 2.73 gears.
According to the TGO data list, the 87 Camaro SC only came with a V6 which has 3.42 gears. All the other A4 cars have 2.73 gears.
Junior Member
Joined: Jun 2007
Posts: 80
Likes: 0
From: MN
Car: 1985 IROC-Z
Engine: 305 H.O.
Transmission: 5 Speed
Axle/Gears: 7.5" 10 bolt, 4.10, torsen posi
Thread Starter
Senior Member
Joined: Mar 2007
Posts: 576
Likes: 0
From: Norway
Car: 1987 Chevrolet Camaro SC
Engine: 305 TPI
Transmission: 700r4
Axle/Gears: 3.42
Re: How to find out what type rear end I have?
I agree to that the SC came with a V6 but it also came with a 305 engine if you wanted some extra power on that time...So my car have stock 305 engine with 700r4 transmission.
I am pretty sure that my car have 2.73 gears since the engine is running about 1400rpm - 1500rpm in 60mph...
Moderator
Joined: Jul 1999
Posts: 17,265
Likes: 168
From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: How to find out what type rear end I have?
If it came with a 305 then it's not really a SC but a SC/LT. The LT option gave it the 305.
The LT has a 165hp 305 and 2.73 gears.
The LT has a 165hp 305 and 2.73 gears.
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