1997 - 2003 F-150

what gears for 37's or 38's?

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Old Nov 30, 2008 | 10:43 PM
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str8t six's Avatar
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From: swamps of la
what gears for 37's or 38's?

i eventually want to get some 38's or 37's for my truck. but i want to breake the gears in first, before i put on the larger tires. how does the truck drive with 4.88's and 35's? i wont be running this combo but for a month.


Do yall think 4.88's are too much for 38's or should i go with 4.56?


whats yall rpms at 70 with your particular ratio and tire setup?


thanks
 
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Old Nov 30, 2008 | 10:55 PM
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you will definatly want 4.88s
 
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Old Dec 1, 2008 | 12:40 PM
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seems like most the guys with 38's around here are running a 4.88 setup thats what i plan to go with eventually.
 
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Old Dec 1, 2008 | 01:23 PM
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4:88's with 35's are fine.

RPM's at 75 will be at about 2600 or so.

They will drop just below 2500 with 38's.
 
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Old Dec 3, 2008 | 07:43 PM
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From: swamps of la
yall dont think that is too high of a rpm?


what kinda gas mileage do you get? it cant be much worse than what i get now!
 
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Old Dec 4, 2008 | 09:48 AM
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around 12
 
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Old Dec 4, 2008 | 11:09 AM
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YOu will love that setup. I have had it for more than a year now.
 
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Old Dec 4, 2008 | 01:10 PM
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i'd say 4.88s with anything over a 35", 4.56's will suffice a 35" max.

im kickin myself because i got 4.88's and 35"s, now that i have a blower i could run a shallower ratio and save some gas mileage and some rpm at cruise.
 
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Old Dec 4, 2008 | 01:13 PM
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trust me..you don't want less than 488s if you are going to be running 37 or 38s
 
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Old Dec 4, 2008 | 03:18 PM
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Originally Posted by efuehrin
trust me..you don't want less than 488s if you are going to be running 37 or 38s
what this guy said
 
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Old Dec 7, 2008 | 09:49 PM
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another vote on the 4.88's.
 
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Old Dec 7, 2008 | 09:52 PM
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Originally Posted by Klitch
i'd say 4.88s with anything over a 35", 4.56's will suffice a 35" max.

im kickin myself because i got 4.88's and 35"s, now that i have a blower i could run a shallower ratio and save some gas mileage and some rpm at cruise.
well look at it this way, you already have the expensive part done, go ahead and lift a couple more inches to fit 37s!
 
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