37's and 3.73? - JeepForum.com

 
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post #1 of 12 Old 09-29-2013, 08:32 AM Thread Starter
Wranglermel
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37's and 3.73?

Probably a stupid question but how awful would it be for my jeep (Tj) to run 37x10.5's with 3.73 gears? Will it hold or do I need to upgrade the gears?

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post #2 of 12 Old 09-29-2013, 10:56 AM
222Doc
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I can not see that working well. not just gears. few 10.5s tires out there, Interco's? made for primarily off road. you are in Florida, so mud? turning those in mud is going to test all your drive train. you must have this tj well chopped up to get 37" unless this has a 4" body lift.

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post #3 of 12 Old 09-29-2013, 11:06 AM
onlyinayj89
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Awful ,highly recommend not to
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post #4 of 12 Old 09-29-2013, 11:13 AM
twiisted71
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Depends on your set-up. I'm going to try running that set-up in my rig (12.50s though)-BUT I'm far from stock and my Tq peak is very low on the RPM/TQ curve comparatively. OD will strictly be for high speed interstate travel. If you have a gasser I'd suggest looking for an old 4 speed with the granny low. OD will be useless to you.
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post #5 of 12 Old 09-29-2013, 06:00 PM
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If you are running the 4.0L in the TJ, you will probably want to go to 4.56 gears to keep your RPMs in line. Also what axles do you have? Have you beefed them up at all? Most stock jeep axles will not handle 37s well offroad. If all you are doing is crawling the mall, you will probably be just fine.

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post #6 of 12 Old 09-30-2013, 05:05 AM
SLADE
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I ran 4.10's and 35's on my 2004 TJ for a little while. It got by, but I wasn't happy with them. It really needed at least 4.56's. I'm now running 5.13's and 37's on it.

I wouldn't even bother with 3.73's and 37's. There would be a re-gear immediately planned.

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post #7 of 12 Old 09-30-2013, 05:16 AM
lpukas2
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Quote:
Originally Posted by SLADE
I wouldn't even bother with 3.73's and 37's. There would be a re-gear immediately planned.
X2, and I thought 3.73 with 33 was bad, that would be horrible!
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post #8 of 12 Old 09-30-2013, 09:01 AM
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Notwithstanding the suggestions that prior posters have tried to make, it is impossible to make a proper gearing recommendation for you unless we know what year your TJ is and what transmission it has. Different gearing combinations in transmissions mean different answers for axle gearing to result in optimum final drive ratio. Overall though when considering all the possible options you might have, I don't think you are going to like 37s and 3.73.

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post #9 of 12 Old 09-30-2013, 09:46 AM
WXman
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A 37x10.50? Holy crap that's going to have a ton of roll going into turns.

And that 230 lb/ft from the ancient 4.0 isn't going to be very happy with turning that leverage. I agree with everybody here...start planning for gears now. I'd actually think about 4.88.

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post #10 of 12 Old 09-30-2013, 10:19 AM
biffgnar
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Originally Posted by WXman View Post
A 37x10.50? Holy crap that's going to have a ton of roll going into turns.
Interesting point I missed the first time. Who even makes a tire that size? Isn't Interco the only one making a 35x10.5? And I don't think they have 37x10.50.

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post #11 of 12 Old 09-30-2013, 12:39 PM
WXman
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Quote:
Originally Posted by biffgnar View Post
Interesting point I missed the first time. Who even makes a tire that size? Isn't Interco the only one making a 35x10.5? And I don't think they have 37x10.50.
I haven't ever seen a 37x10.50 with my own eyes. I was just taking his word for it that they exist. Who knows...

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post #12 of 12 Old 10-02-2013, 08:51 AM
tyvanwie
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Quote:
Originally Posted by biffgnar

Interesting point I missed the first time. Who even makes a tire that size? Isn't Interco the only one making a 35x10.5? And I don't think they have 37x10.50.
http://www.militarytires.com/

I don't even own a jeep anymore
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