Rear Gears

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Sep 26, 2004 | 08:54 PM

grey77

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From: So. La.

Rear Gears

i have 3.07 gears in the rear, of my 77F-100 2wd, and that just ant goin to cut it so i'm thinkin of puttin 3.73 gears an locking it up b/c i have some 28in. tires and they are still farley new but when they wear out then i want some 31in. swamper LTB's tires an i'll be i the mud a good bit, but it will still be a daily driver, so would it be better to have 3.54 gears or what. Because i still want it to perform good but i would also like the gas milage to be good also. Thankz for any responses

Sep 27, 2004 | 08:17 AM

mark a.

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If you are going to put 31" tires on it I'd put the 3.73 in it.

Sep 27, 2004 | 08:55 AM

77300i6

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From: Lewistown, PA

What engine/tranny combo do you have? I have a 77 4x4 with a 300/435 and 3.50 gearing. I stepped up to 31" tires and it had little effect on the perfomance, if anything it brought my rpms down a little bit, but not much. If I were to go to any size bigger (tires) i would cerntainly step up the gear ratio.

Sep 27, 2004 | 05:11 PM

grey77

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From: So. La.

I have a 302/C4 engine/tranny combo. Would 3.73's be too much for the 28" tires ???

Sep 27, 2004 | 09:13 PM

SoCalDesertRider

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From: USA

3.73's will be low for the 28's but will be perfect for the 31's. I have a 302/3-speed and 3.50 gears in my '69 Bronco with 31" tires and the 3.50's are a little too high. 3.73's would be just right.