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Thread: what gears do I have?
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11-20-2008, 10:12 AM #1
- Join Date
- Feb 2007
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- Little Rock, Ar.
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- 25
- 1998
what gears do I have?
I have a stock 98 Z28 A4 runs 2k rpms at 70 which seems really high to me. my truck runs 1.6k at 70. It feels like the trucks have a tall od compared to these cars. Anyway, any idea of my stock rearend gear?
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11-20-2008, 10:20 AM #2
check your door codes and see which of the following you have...
GU2 - Axle Ratio 2.73, Rear
GU4 - Axle Ratio 3.08, Rear
GU5 - Axle Ratio 3.23, Rear
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11-20-2008, 10:37 AM #3
- Join Date
- Feb 2007
- Location
- Little Rock, Ar.
- Posts
- 25
- 1998
wow it says GU2 but dang 2.73's turn over 2K at 70mph .... cant b right
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11-20-2008, 10:48 AM #4
- Join Date
- Jul 2005
- Location
- Jacksonville, FL
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- 2,723
Can't always tell by the door codes, my car came with 2.73's but I changed to 3.42's. 2K at 68 = 3.23's assuming stock tire height and speedo is correct. Try playing around with the calculator at www.f-body.org/gears/
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11-20-2008, 10:49 AM #5
4L60E gear ratios: 1st 3.059, 2nd 1.625, 3rd 1.000, 4th .0696,
Reverse 2.294.
i believe these to be what are in the F-body A4's...
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11-20-2008, 11:24 AM #6
it be right 2000 is on the money
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11-20-2008, 11:26 AM #7
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11-20-2008, 11:59 AM #8
- Join Date
- Jul 2005
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- Jacksonville, FL
- Posts
- 2,723
You can plug in different gears in the link and it'll tell you the differences in RPM at different speeds for each. If doing gears I'd go with 3.73, I went with 3.42 because I got a good deal on a complete rear out of a M6 car. If you already have 3.23's it's not worth changing to 3.42's.
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11-25-2008, 06:15 AM #9
- Join Date
- Feb 2007
- Location
- Little Rock, Ar.
- Posts
- 25
- 1998
do the V6 cars have the same rearends? I have a GU4 V6 car.
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