Speedo Gears for T5 & 3.70

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Dec 4, 2000 | 06:54 PM

Kevin91Z

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iTrader: (1)

Joined: Jul 1999

Posts: 10,950

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From: Orange, SoCal

Car: 1990 Pontiac Trans Am

Engine: 355 TPI siamesed runners

Transmission: Tremec T56

Axle/Gears: 12-Bolt 3.73

Speedo Gears for T5 & 3.70

I have a 3.45 rear end now, with speedo gears of 7 purple and 19 white. I believe for a 3.70 rear end I want a 20 tooth. Is that correct? I'm using stock 245/50-16 tires.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
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Dec 5, 2000 | 06:11 PM

Kevin91Z

Thread Starter

Moderator

iTrader: (1)

Joined: Jul 1999

Posts: 10,950

Likes: 27

From: Orange, SoCal

Car: 1990 Pontiac Trans Am

Engine: 355 TPI siamesed runners

Transmission: Tremec T56

Axle/Gears: 12-Bolt 3.73

Back to the top... I know someone has done this.

It's the same speedo gears as a 3.73 and T5.

Dec 5, 2000 | 08:26 PM

kjgroen

Member

Joined: May 2000

Posts: 419

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From: Parkersburg, IA, U.S.

Car: Trans Am

Engine: L69

Transmission: T5

Axle/Gears: 3.73

what color is it?? Thank U Kevin

Dec 9, 2000 | 08:58 AM

Brian Shaughnessy

Member

Joined: Jul 1999

Posts: 216

Likes: 0

From: Saugerties, NY, USA

Car: '89 Formula

Engine: 355 TPI

Transmission: T56

Axle/Gears: 3.70 9 bolt.

According to the chart I got it's a 7 purple and a 21 orange.

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'89 Formula - Thunderchicken - 355 Vette L98/T-5/3.45 9-bolt/black/t-tops - the fun car!
'90 GTA - The GTA - 5.0 LB9/TH700/3.27 9-bolt/black/t-tops/tan leather - the cruiser.