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How to determine gears?

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Old Aug 15, 2007 | 12:58 PM
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Default How to determine gears?

Im wondering which gears i have in my car. Around what speeds would the car be shiftin into the next gear if i were to have the 3.23's?
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Old Aug 15, 2007 | 01:27 PM
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Look at your RPO codes......thats what I would do. It will say GU_ (2-5)
Then decode it online.
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Old Aug 15, 2007 | 01:28 PM
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If you PM your VIN to me I can send you an option list for your car.

Jim
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Old Aug 16, 2007 | 05:13 AM
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If the gears are stock, the GUx code is the guaranteed way to tell (on the door frame sticker).

If you think they've been swapped by a previous owner, get it into lockup on the highway, make note of the rpm

@55mph
2.73's = 1378rpm
3.23's = 1630rpm
3.42's = 1726rpm
3.73's = 1882rpm

Your stock tach will be off a little bit, so a scanner would really be more precise, but that will at least let you know if someone has done a swap.
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Old Aug 16, 2007 | 07:54 AM
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The "guaranteed" way to see what gear you have is to pull the diff cover and read the ring gear. That takes all the guess work out of it.
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