Common Gear ratios 1999? 4WD

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#11

07-28-2010, 06:42 AM

rriddle3

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Quote:

Originally Posted by Benedict1337

wow I always thought i had 3.73 gears but it seems I actually have 3.42 looking at the rpo codes, no wonder I'm getting crappy gas millage...

It would be worse if you had 3.73s. The lower the ratio (bigger number), the more power to the rear wheels but worse mileage.

#12

07-28-2010, 09:40 AM

Tony H

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Is there anything on this Site with what the RPO codes mean?

I got the answer to my original Post here. But I was just wondering about the 6 Columns of Codes and what that all means.

#13

07-28-2010, 09:43 AM

01BlackBeauty

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Quote:

Originally Posted by swartlkk

Actually, you can find the gear ratio from the VIN. It just isn't part of the VIN, but rather, needs an application to look up the RPO codes for that VIN. CompNine.com has such an application in their VIN Decoder.

Great Link - Thanks!

#14

07-28-2010, 05:21 PM

swartlkk

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Location: Waterloo, NY

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Quote:

Originally Posted by Tony H

Is there anything on this Site with what the RPO codes mean?

I got the answer to my original Post here. But I was just wondering about the 6 Columns of Codes and what that all means.

RPO == Regular Production Option

The list is a list of all of the options installed on your truck.