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Old 10-03-2008, 09:37 AM   #1
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5.13 gears?????

Are 5.13 gears to much?
For a 03 TJ with an automatic transmision and 35 inch KM2's
Front axle is a Dana 44----rear is an 8.8.
What kind of RPMS would I be running with OD on at 70 mph
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Old 10-03-2008, 09:57 AM   #2
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Thinking about purchasing these axles this is the reason for this question.
If this is not good for this combo what size tires would work with this set up.

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Old 10-03-2008, 10:32 AM   #3
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I'm running 5.13's with 36" tires and Dana 44's. It's perfect with my automatic.
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Old 10-03-2008, 11:07 AM   #4
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if you drive alot on highway you will be stresing your engine by running at higher rpms all the time and you will def be burning a lot more fuel off!
If its only a off-road rig go for it!!
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Old 10-03-2008, 12:18 PM   #5
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Quote:
Originally Posted by 01blackws6 View Post
if you drive alot on highway you will be stresing your engine by running at higher rpms all the time and you will def be burning a lot more fuel off!
If its only a off-road rig go for it!!
Speaking from experience?
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Old 10-03-2008, 12:37 PM   #6
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I would not be honest saying "yes" with that same setup, but it would seem to me with such a ratio that those symptoms would occur unless different gearing in the trans would be set up for an od or something.
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Old 10-04-2008, 01:55 AM   #7
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Yeah, the OD that your 4 speed auto has is just fine for those gears. I would think you will be very happy with this ratio both on and off road.

However with that setup you are going to be running I'd start looking for some 37's.
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Old 10-04-2008, 11:14 AM   #8
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I dont do rock climbing (yet) but how much lift do you need to cram 37's under a tj. I dont mind the look of 35's under 4 inches with a leveled jeep. Any help would be nice.
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Old 10-08-2008, 08:58 PM   #9
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Quote:
Originally Posted by chiro2736 View Post
I dont do rock climbing (yet) but how much lift do you need to cram 37's under a tj. I dont mind the look of 35's under 4 inches with a leveled jeep. Any help would be nice.
Here's 5.5"'s plus 3/4" spacers and 36"'s.



With proper bumpstops and the suspension and body set up properly you can clear 37's on much less lift than I have.

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