I see you're in Louisiana. I imagine your tire/wheel/gear performance would feel significantly different 50 miles West of Denver.

 

Running a true 33in high tire with 3.73 on my unlimited sahara. What would cost be to replace the gears to 4.10/4.56/4.88?
Suggestions on what size to go to?

 

As far as the cost to regear, it really varies based on your location and the shop. My Jeep is going in for gears tomorrow, and I found a shop that charges $450 per axle for the regear plus parts (gears and master rebuild kits). The total for the regear is $1500. The first local shop I got a quote from wanted $2950 for the regear.

I'm also getting an elocker and gussets and ball joints at the same time.

As for what gears are best for you, it really depends on how you use your JK (on-road, off-road, highway, local) and what your future plans are (bigger tires, rock climbing, etc.). As a general rule it seems to me that standards do better with one gear lower (numerically higher) than autos but I am not an expert. Additionally, 3.8s require one gear lower than the equivalent 3.6 due to less horsepower than the 3.6. Again I'm only relaying what I've learned from reading the forum. If you are looking to maintain a factory like ride, then a quick and dirty method is to take your factory gear ratio and divide by the factory wheel size and then multiply by your new wheel size. Round up to the next numerically higher available gear size....4.10, 4.56, 4.88, 5.13, 5.38.

For me that calculation results in 4.08 so 4.10 for me. Hardly seems worth it to regear one size so I'm going 4.56 as I don't do a lot of highway driving and may go to 37s (true 35s) in the future.

 

yes just flat land down here, I have lived in Colorado a few years when I was stationed at Ft. Carson, beautiful state. if I lived there I'm sure I would be regearing to at least 4.56.

 

I have a 2010 I need to regear ASAP.
3.8, manual, 3.73 gears, 35" Mud Grapplers, 2 door. I live in SE Michigan and it's generally flat.

Hauling ass home from wheeling trip in Manistee National Park this morning to work I was driving into a strong headwind, and 6th was useless. Even on the flat stuff going 75 it was quickly slowing me down, even at about 2400rpm. Had to stay in 5th (admittedly driving faster than I normally would on expressway -due to gearing and mileage I stick to 65ish, just enough revs to keep moving on the flats) and hit a new low for mileage.

I guess what I'm trying to say is that even if 3.73 normally works (thank God for 4lo!) there'll be a time it doesn't. I mean, I've had issues on steeper hills before, but the wind straight up made me it's bitch,lol.

Anyway, while flatland on 3.73 is usually tolerable I can't regear fast enough now! Just thought I'd add my .02.



Edit: also meant to add that having a manual makes it easier to coax power out of crappy gearing, cos I thought I saw someone mention it backwards earlier. Pardon me if I'm mistaken or it's already been corrected! 😊

 

I have been rocking my 6speed 2 door 2011 on 33 bfgs 2inch coil spacers since new up to 86000 miles . I'm finally going with the lift i want and matching gears and driveshafts and really its best to do all 3 of those at once. 3.73's are not ideal but have worked for me. In my case in 4H and 4L never felt under geared at the local terrain parks or around town when it snows. Mine gets muddy at least once a week in the summers and winters its gets wheeled even more. The factory gears and bigger tires up to 35 work, just a bit of a slower JK around town and highway Try it,m it you don't like it regear it.. Since JK are really capable machines, Im glad i waited on gears and driveshaft upgrades now Im getting what I want for the parks i take it to. When the minivan takes you at the green light that in Chicago stinks, but its livable. 35's would be about the same. if you hate it then regear it. But if you like to drive fast then yes regear is gonna be mandatory as its kinda a heavy pig with the 3.73's I purposely bought the base model stick shift because i knew I would be taking out to the atv parks , just spent the $ in other parts for where i wheel it, mainly bumper and winch/armor. and have lived with the crappy gearing , its not terrible but as mentioned above fighting a strong wind is kinda tiresome on a long trip.... so is that worth $1000...

 

I have a 14 jk 2 door with 3.21 gears. I just installed some 35s and a 2.5inch life. It looks sick and on top of all the weight of the bumpers and and everything, I can for sure feel a difference but for now it has not been an issue. I am planning on a regear but not just yet. Possibly in a year or so though! Oh and its an automatic too!

 

How'd the 4.56s turn out? I'm doing mine in a few months. Power restoration? Fuel economy?

 

Member hasn't signed on here in over a year so response gonna be hit and miss. Don't expect it to feel like you have more HP or anything, just that the jeep will shift right and drive normal, as it should and used to. It's not a "oh my gawd this is awesome!" feeling.

 

Yeah, 3.73 to 4.56 was a shift but not what I was expecting. For me, I've had 3.73's and been everywhere with them for 200k miles. I've just clocked 3k miles since my regear and here's what really happened (despite reading about how great it was on the internet)- fuel mileage is about the same, certainly didn't increase any. Power- well, you're in each gear a shorter amount of time. First is a granny gear and sixth is basically fifth and you're capped at 75-80mph (turning 3k rpms). Yes, I can use 4hi again off-road without being in 4lo and 2nd for everything, giving too much gas in first and dumping the clutch, but was it worth it.....for me.....I probably would have been as good or better served with rubi 44's with 4.10's based on all of the time I've had with the 3.73's. I didn't need much, but did need something.