1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

rear end gear ratio

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Old 09-11-07, 02:16 AM
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Noobist

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rear end gear ratio

i have a 85' gsl 5-spd and a 84' gs with an auto trany can anyone tell me what the rear end ring and pinion gear ratio is with the automatic trany ive heard its lower (searched, but if u can find it point me to it)
Old 09-11-07, 05:33 AM
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3.90 for the 4 speed
4.11 for the auto
Old 09-11-07, 11:00 AM
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3.909 for ALL FB's. This goes for both 5 speed and Auto. (Except GSL-SE)
4.083 '84 GSL-SE
4.077 '85 GSL-SE

The trannies are different though.

Here's a good post (I hate "quoting" myself)
https://www.rx7club.com/showpost.php...0&postcount=14

Last edited by Directfreak; 09-11-07 at 11:05 AM.
Old 09-11-07, 02:50 PM
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yea i parted out an auto and the diff was just the normal 3.90
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