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Tim Willis
Dodge Dakota
JOIN HERE
3/05/2009
19:41:27
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 Subject: Better milage
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Message:
I have a 96 with a 5.2L would like to know if easier to get a ring & pinion or swap whole rear end. Would like to go to a 3:21 ratio. Open to any infor.
Thanks!
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JasonB
Dodge Dakota
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3/05/2009
22:15:16
|  RE: Better milage
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Message:
3.21 will not necessarily give you better mileage.
Depends on tire size and transmission gear ratios.
If you have 3.5 rear, change to 3.9 (or even 4.1, depending on your driving requirements) might be a better choice.
Again, much depends on tire size. I have 3.5 rear and changed tire diameter from 31 inches to 32 inches, which is same as using 3.4 rear gears. Lost 4 MPG highway, based on fuel used/miles travelled computations.
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Bucket
GenII
3/06/2009
12:10:54
| RE: Better milage
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Message:
My truck had 3.21 and i had them swapped to 3.90 and i still have the gears let me know if you want em.
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Tim W
Dodge Dakota
JOIN HERE
3/07/2009
18:09:49
| RE: Better milage
IP: Logged
Message:
Hi JasonB I am running 235/75/15, stock size are
215/75/15. I do not drive hard use as a second car, but I do work on a farm & carry a couple of tool box's. I have a 3.55 rear. I only get 12.5 to 14.5mpg I usually drive 45 to 50 the 13 miles to work. Have talked to others & my uncle has a 94 reg. cab he gets around 17 to 19 with his & i know he drives harder than i do.
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