85 IROC rear end gear

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May 22, 2002 | 04:30 PM

Sergeant

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Junior Member

Joined: May 2002

Posts: 7

Likes: 1

From: North N.J.

85 IROC rear end gear

No rpo sheet. Can anyone tell me what gears came in this car. It is an automatic with tpi. Thank you.

May 22, 2002 | 06:10 PM

scottmoyer

Moderator

Joined: Jun 2000

Posts: 8,464

Likes: 219

From: Florida

Car: 87 IROC-Z, 82 Pace Car

3.23 or 3.42 with G92 option

May 22, 2002 | 06:48 PM

85 T/A WS6

Supreme Member

Joined: May 2001

Posts: 1,705

Likes: 3

From: Washington

Car: Recaro Option T/A

Engine: 305 Tuned Port Injection

Transmission: Automatic

Axle/Gears: 3:27 Borg Warner

Look on your axle tube, passenger side. There is a code there, that will tell you for sure.

Don

May 23, 2002 | 06:43 AM

Matt427

Member

Joined: May 2002

Posts: 179

Likes: 0

From: McDonough GA

You could have the 3.42 gear without having RPO G92. Here's the spid from my old '85 IROC that shows GU6 but not G92.

May 23, 2002 | 07:45 AM

JamesC

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iTrader: (5)

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

My 85 IROC has 3.23s. I believe I read in one of the tech/info articles on this site that 3.23s were standard.

JamesC

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