_J__C_

If/when I re-gear I will probably end up with 4.56, but it's a tough choice since the 3.73's work fine right now. Granted more power would be nice but I've driven from Indiana to Cap Cod and back, to the Florida panhandle and back a few times, and now I'm in Virginia. The only problems I've had were in the mountains and on moderate grades. In those situations I put it in 5th and -once- I had to go to 4th, but I blame the toll booth for that one, I had no momentum. New gears would be nice, but so would a better lift or bumpers and a winch.

biggreen71

U proved my point.. it has nothing to do with motor and tranny. It is strictly tire and gears. Original post was asking about tire to gear change, on 35's most rigs will do fine on 456 or 488's, if u talking 6 speed manual u may have to go a touch lower due to the xtra gear.

My case 31's with 373's (3speed auto) to 35's rounded up is 456's. Would work fine. Wasn't talking motor and tranny in the first place. If u read I said adjust as needed..which means depending on ur tranny set up u will need to go higher or lower

U talk like I ment that is the answer to all.. which is nowhere close to what my first post was about.

That thing is ment to be used as a guide only... and anyone should be able to figure that out

nthinuf

I would guess that about 99% of auto JK owners would disagree with that. Would those gears be a good option for an older jeep with the high output inline 6? Maybe. But for a jk, with the jk's engine? Nope.
4.56's will get a 'manual' on 35's back near a stock ratio. Those gears are hard to come by, which is why most 'manual' guys on 35's recommend 4.88's. Going a touch lower to 5.13's raises the freeway rpm's more, so driving style will come into play there. Or did you mean a touch lower the other way, which is back to factory 4.10s?

Again, you can't use generic charts or past experience with a JK. The engine and transmission ratios are different...

Venom19

Thank you!!!!

biggreen71

Mine is a 98 tj.. and generally speaking that calculater would work fine...that Bing said I'f theres something different with the newer rigs that I'm not aware of, then props to u on the correction

Yeah I ment a touch lower, as in higher the number the lower the gear

jimk403

I don't know how you guys on 35's can live with stock gearing. I have 5.38s with stock tires and it is very nice. Now I am re-thinking the 35s I wanted. Probably get them anyway, the wife wants it to look "beefier".

nthinuf

Lol, that's the issue. This is a JK forum - gearing advice based on a TJ will be incorrect, particularly for those of us with auto's. The engines and gearing are that different.

-How many TJ guys with auto's and 35's are running 5.38's? For a JK, on the other hand, it is quite common - as I mentioned earlier, I would be totally pissed off if my drivetrain guy talked me into wasting $1500 on 4.56's or 4.88's...

User 122117

Anytime!

Jeff Hill 71

This is the stage I'm at...I want 35's on my Jeep, don't want to pay for regearing. I am looking into getting the cold air intake, and have been told about this program, but not exactly sure what it is or how to obtain it. I am not a crazy off roader, I do trails and the beach down in Brigantine, but love the look of jeeps with 35's on them. I have a 2" spacer lift with what I thought were gonna 33's but actually measure 31½" and to me it looks way to small of tire for the Jeep. Even though I just got them, my wife is gracing me with more monies (lol) to get the Jeep where I want it. But when I threw the regearing in there, she wasn't quite as understanding. So that's why your comment on this post caught my eye. I am new to this forum and to the Jeep "world". Any info you have would be greatly appreciated. Thank you in advance.

horrocks007

#1 - Don't get a Cold Air intake. I have wheeled in the pine barrens and you WILL encounter deep water on the trails and your cold air intake can put you at risk to damage your jeep badly. - Don't do it!!! You'll not only suck in water, but superfine sand too and then your engine is done! Also a waist of $300 that you could be using towards new gears and lockers. Trust me! Most people in your area who take their jeeps off road regularly have snorkels for this reason.

#2 - You can look up your vin on the internet and pull your original build sheet. Because you have a stick, I am sure you can live with 35's for sometime. If you do have 3.21gears and get 35's it's still the SAME ratio as a stock JK with 32's, automatic, and 3.73's. So yes you'll be slower, but that is how my jeep came to me, it's not a deal killer.

#3 - Programmer, I don't see why you need one. I have owned both Superchips, and currently run a Diablo Tuner, but mostly for proper shifting points. I wouldn't spend your money on this either as you have a stick, just save for lockers and gears. These tuners are grossly overpriced nowadays.

Hey, if you listen to me I just saved you $500.00 on crap that will have a marginal effect on the jeep, about half the cost of gears from Globex4x4 out in Tom's River.

My 2 cents anyway.