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Old 03-15-2007   #1 (permalink)
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Default Changing Gears Question

I'm interested in upgrading to 3.73s but i often drive between cities on various highways and interstates. With these new gears, where will my rpm's be while cruising 80mph? Will i lose mpg on the highway?
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Old 03-15-2007   #2 (permalink)
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the 3.73's will do fine. you will notice a small drop but not much. well actually your car comes stock with 3.07's?
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Old 03-15-2007   #3 (permalink)
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also is it an automatic or manual
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Old 03-15-2007   #4 (permalink)
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Its a manual. I've read the 4.10s maybe be a bit much for highway driving on the manuals. Is that true? How about a Traction Lock. Should this be done with the gear change?
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Old 03-15-2007   #5 (permalink)
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4.10'a would probably be a bit much given that you have a 6 and you drive on the freeway a lot. i would do the 3.73's
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Old 03-15-2007   #6 (permalink)
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The T-lock is a nice upgrade puts power to both wheels you probably have 3.27's in it , auto's have 2.73's. A 3.73 upgrade will feel nice
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Old 03-16-2007   #7 (permalink)
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since its a manual... i would go with the 3.73's you dont want to be shifting that much with the 4.10's... just remember you will have to get a tune once you get the gears...
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Old 03-16-2007   #8 (permalink)
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The speedo would need to be adjusted. You would need to order the correct speedo gear to compensate for the change in ratio.
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Old 03-16-2007   #9 (permalink)
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Originally Posted by Cobra9898 View Post
the 3.73's will do fine. you will notice a small drop but not much. well actually your car comes stock with 3.07's?
No, 2.73s.

I'd go with 3.27s or 3.45s if you do a lot of highway driving.
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Old 03-16-2007   #10 (permalink)
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do they even have 3.45's? i thought it went 3.27 3.55 3.73 3.90 4.10 4.30(which i have ) and 4.56? but yeah now that i think about it the 3.55's would probably be your best bet if you are really wanting to not have any effect on mileage. but you can do the 3.73's and be ok with mileage though
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Old 03-16-2007   #11 (permalink)
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Originally Posted by Cobra9898 View Post
do they even have 3.45's? i thought it went 3.27 3.55 3.73 3.90 4.10 4.30(which i have ) and 4.56? but yeah now that i think about it the 3.55's would probably be your best bet if you are really wanting to not have any effect on mileage. but you can do the 3.73's and be ok with mileage though

For the 7.5 it's 2.73, 3.27. 3.45, 3.73, 4.10 (and I think there may be a 4.88 out there, too)
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Old 03-16-2007   #12 (permalink)
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ah yes i forgot its the 7.5 end...
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