GM Drivetrain & Suspension Chassis | Transmission| Driveshaft | Gears/Rear End/Differential | Traction Aids

what rear gears do i have?

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Old Mar 10, 2008 | 06:39 AM
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03 BLACKOUTSSS's Avatar
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Default what rear gears do i have?

I just bought a 97 SS, and the rear gears have been changed. in 4th gear, at 2000 rpms I am at 36 mph. forgot to mention, its a 6 speed. any help is appreciated.
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Old Mar 10, 2008 | 08:24 AM
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Jack up the rear and spin the rear tire one complete turn...count how many rotations the driveshaft makes.
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Old Mar 10, 2008 | 10:38 AM
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enough said, thank you.
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Old Mar 10, 2008 | 11:59 AM
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or here's an easier way... look in the glove box for one of these codes...

GU6 - 3.42's

GT4 - 3.73's

GU5 - 3.23's
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Old Mar 10, 2008 | 12:02 PM
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the gears have been changed silveradokid
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Old Mar 10, 2008 | 09:39 PM
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Silveradokidd, thanks man, but like 99 sierra said, the rear was changed. Originally, it was 3:42's, I have a feeling that I am running 4:10s right now. It runs at 2000 rpms at 72 mph in 6th gear, if thats any indication.

Unfortunately, I am not going to be home for another 2 weeks, traveling for work.
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Old Mar 10, 2008 | 10:54 PM
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gotcha man
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