Gear ratio I.D.?? - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 12-06-2002, 05:40 PM
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Gear ratio I.D.??

Anyone know what ratio is or was standard in my pick up? 1983 3/4t Custom 20 Deluxe. Rear is the 14 SF and front is a 10 bolt. The tag is ripped off the rear diff. Only markings area a "4" stamped on the lower pass side of the 14 blt. I am short a floor jack and a buddy to count revolutions.
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post #2 of (permalink) Old 12-06-2002, 06:19 PM
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Re: Gear ratio I.D.??

Well it is kind of hard to tell. the two most common were 3.73:1 or 4.10:1 hope that helps.
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post #3 of (permalink) Old 12-06-2002, 07:57 PM
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Re: Gear ratio I.D.??

If it's got the stock axles, you can tell from the 3 digit alpha numeric code in the glove box.
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post #4 of (permalink) Old 12-06-2002, 08:36 PM
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Re: Gear ratio I.D.??

The glove box RPO codes will tell you. They might be on the driver's side fender well instead.

Code Ratio
GU2 2.73
GU4 3.08
GU5 3.23
GU6 3.42
GT4 3.73
GT5/GT8 4.10

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