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Tony
Dodge Dakota
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10/06/2005
00:40:21
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 Subject: gear ratio
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im thinking of swappin out the gear set in my 2 wd 3.9 im just wondering what everyones opinion of the most fuel efficent ratio is for mid and upper range rpms is(I do a lot of highway)?
thanks for the help!
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toolfan
Dodge Dakota
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10/06/2005
01:02:54
| RE: gear ratio
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i would go with 3.21 or 3.55 my 3.55s are good all around. the 3.92 suck for cursing at 70-75mph they just eat gas.
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tony
Dodge Dakota
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10/06/2005
09:43:31
| RE: gear ratio
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got 3.55 in there now, think its worth it to go to the 3.21s?
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Mikes99Dakota
GenIII
10/06/2005
10:31:19
| RE: gear ratio
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You will see gas mileage improvements with 3.23s but you wont be geared to go fast.
1999 RC Auto 5.2L
Mopar PPH, Magnaflow 3" w/cut-out, 3.90s/Suregrip, 50mm Fastman TB
Track Times:
9.47 @ 72.21mph
14.89 @ 91.33 mph
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prodak
Dodge Dakota
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10/06/2005
10:44:28
| RE: gear ratio
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Message:
I'd stick with the 3.55s. What size tires are you running? Going up a size or two (in diameter) will do the same thing as changing to taller gears, and you can easily switch back if you don't like the results. Plus there are many things you can do to improve mpg without hurting performance. What, if any, mods do you have now?
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