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Gearing question for modded '78

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Old Feb 16, 2010 | 05:57 PM
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From: Camden AR
Default Gearing question for modded '78

Hello all, let me tell you a bit about my car before I ask your advice...
it is a '78 Pace Car with a ZZ4 350 and 2004r tranny...it's got the original gearing (3.08, right?) and I'd like some more torque (after all I don't really need to keep driving it at 120). Anybody out there with a similar setup?...any suggestions?
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Old Feb 16, 2010 | 06:26 PM
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3.55 or 3.70s will wake it up and still be very driveable on the highway.
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Old Feb 16, 2010 | 07:26 PM
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I was thinking 3.70s...somebody in town recommended a 4.11...too much?
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Old Feb 16, 2010 | 07:36 PM
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I have had 3.55, 3.70 and 4.11 gears in my car with varous transmissions. I always felt the 4.11 was just to much gear for a street driven car. The 3.70 with the 1st gear of the 200 will provide plenty of acceleration. Also the 4.10 gear will need a different carrier or a special 4 series gear to fit on a 3 series carrier.
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Old Feb 16, 2010 | 08:52 PM
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perfect advice...3.70 it is! Thanks Gordonm!!
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Old Apr 30, 2010 | 03:55 PM
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Well...I got the 3.70 in, but my mechanic says he's having problems finding the info to adjust the speedo for the new gears. I'm running standard tires...any help out there?
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