4:10 rings for $200 with 12K on them - for 35" or 37" eventually?

[j.o.y.ride]

And yet dozens here - if not many dozens - are running 35s on their Rubicon with the stock gearing....

Sure. But if I am choosing gears, vs factory installed gears, I would not pick 4.10 for 35 esp with the possibility of 37.

Sponsored

 

[ShadowsPapa]

Sure. But if I am choosing gears, vs factory installed gears, I would not pick 4.10 for 35 esp with the possibility of 37.

That was my assumption, and why I said this -
>>I suspect you may be suggesting that if you are going to pay to re-gear ANYWAY, why stop at the edge of good - do it so they would be good for either sizes, perhaps?<<

 

[DocMike]

Damn. Really good catch.

Was just browsing through threads this AM and I didn't see anyone say this here, but Rubi gears won't fit your axles unless you have the Max Tow (in which case you'd already have 4:10's). If someone already said that, my bad. If you're hellbent to pick some up anyway, I have a set of 4:10's with 1500 miles holding down some paperwork in my garage that I'd trade for some beer.

 

[ShadowsPapa]

Damn. Really good catch.

Actually they will fit......
I used to think they would not as well because of a chart from a couple of years ago - but the carrier in the JT is newer and different and the 3.73 carrier WILL take the 4.10 gears.
The JT carrier is different than the Wranglers even if the differentials seem the same otherwise. These axles will allow that gear swap.

Check out the posts in this thread where folks have done it ->

https://www.jeepgladiatorforum.com/forum/threads/4300-lbs-w-3-87-standard-tow-package.33265/page-3

 

[FR33DOM]

As stated before, if you're gonna spend the $$ to regear, why not get the exact right ratio? Id hate to see someone try to save 400 then regret not doing it they way they really want it for years...

I just got 5.13s on mine (on 37" tires) and just got thru initial break in period. I've only got about 120 miles on them so no hard accelleration but after a trip to Mueller State Park and back I can say in the mountains 5.13 is perfect and significantly MUCH better with 37s on 4.10s.

Frankly I didn't think 4.10s were geared right on the stock 33s as it was not able to hold 7th or 8th very well even in mild inclines on the highway at elevation. I think in Colorado, 4.56 should be stock gearing for 33s and if you're going to max out on tire size at 35's then you could do 4.56 or 4.88s. If you're gonna be trailering or spending more times on mountain highways then 4.88 on 35s would work very well. If you think there is a decent chance of 37's 4.88 will be probably be the best compromise. Your mileage won't be affected but maybe 0.5 mpg either way. However, I feel at this altitude 5.13 on 37 is ideal for keeping the shifting minimal and staying in the better torque band.

My .02

 

[khokhonutt]

Actually they will fit......
I used to think they would not as well because of a chart from a couple of years ago - but the carrier in the JT is newer and different and the 3.73 carrier WILL take the 4.10 gears.
The JT carrier is different than the Wranglers even if the differentials seem the same otherwise. These axles will allow that gear swap.

Check out the posts in this thread where folks have done it ->

https://www.jeepgladiatorforum.com/forum/threads/4300-lbs-w-3-87-standard-tow-package.33265/page-3

I don't think the point is whether 4.10s in general will work on a 3.73 JT carrier, it's more whether 4.10s off the Max Tow/Rubcon carriers will work in a standard axle. I can tell you I've talked to my gear guy and from what he and his gear supplier has said, the carriers at least, are specific and different between the Max Tow/Rubicon axles and standard axles. *If* I was looking to buy a used gear set, I'd confirm that specific fitment detail before I spent the money.

 

[ShadowsPapa]

I can see the carrier being different for a Rubicon - but max tow? The Rubicon has the electric lockers - max tow does not. In fact, you can now get Sport S max tow with the LSD like the Overland offers. If there was a difference, there'd be two carriers for Overland and 2, at least, for max tow then another for the Sport S without max tow since the Sport and Sport S without max tow have the same axles as the Overland.
The axle tubes and axles are longer but makes little sense to change carrier when the centers should be the same.

 

[jdwhichard]

4.56 are for 35s that what i ran on my xj with dana 30 . tires are to tall for 4.10s .4.10s are the best for 33 tires .believe me i tried them all with my Xj 4.0 i know the 4.88 and 5.12 dana 30 had a weak pinion gear with so few teeth on them . 33 tire going on my truck tomorrow . with 4.10 will let you know the difference vs 245/70r17

 

[ShadowsPapa]

4.0 is hardly a good comparison. They don't have near the spunk of a 3.6
I run 33s fine with 3.73 although I have yet to see how it tows.
That would be my only sticking point. Otherwise I'm good with 33 tires and 3.73 gearing.
There are a lot of forum members slapping 35s on their stock 4.10 gears.
You sure don't see everyone here re-gearing.
Of course you are towing a crazy load so yeah, you'll need deeper gears than a lot of people.

But pulling with a 4.0 isn't exactly a fair comparison to a modern vehicle with a modern engine.

 

[danielspivey]

There's a WHOLE LOT of people just on this forum running 35s on 4.10 gears! That's one of the first thing Rubicon owners seem to do - up from the stock 33 to 35.
If I can run 33s on 3.73 gears why can't someone run 35s on 4.10 gears?

Totally agree, I run 285/75r17s with my max tow and barely noticed the difference in stock, 35s are a tad bit bigger.

4.10s will be fine for 35s, shoot Jeep made enough room to have a spare 35 underneath the bed!

 

[jdwhichard]

4.0 is hardly a good comparison. They don't have near the spunk of a 3.6
I run 33s fine with 3.73 although I have yet to see how it tows.
That would be my only sticking point. Otherwise I'm good with 33 tires and 3.73 gearing.
There are a lot of forum members slapping 35s on their stock 4.10 gears.
You sure don't see everyone here re-gearing.
Of course you are towing a crazy load so yeah, you'll need deeper gears than a lot of people.

But pulling with a 4.0 isn't exactly a fair comparison to a modern vehicle with a modern engine.

yes there is a world of difference ii love my 8 speed with 2 overdrive and you can shift manual but working with Xjs for many years being a much weaker motor and the bullet proof aw4 being just 4 speed with overdrive being a much lighter vehicle by 1500lbs for max efficiency with the 4.0 you wanted rpm at 2200 rpm at 60 4.10 are most efficiency they were the best choice for 33 tire and 4.56 were the best ratio for 35s not saying the gladiator would have problems running 35 tires even with 3.73 since first gear is like 4.73 for the auto and 5.13 for the manual the rpms will be too low at 60 mph with .70 overdrive ever heard a diesel engine is most efficient at full throttle , max power for amount of fuel used , your fuel economy and power level will suffer of course you could just run in 5m or 7a . 1 stick by 3.73 for 31 4.10s for 33 and 4.56 with 35s for max efficiency . ever jeep believes this 3.73s for 245/75r17 4.10s for 285/70r17stock to boost fuel mileage .

 

[danielspivey]

yes there is a world of difference ii love my 8 speed with 2 overdrive and you can shift manual but working with Xjs for many years being a much weaker motor and the bullet proof aw4 being just 4 speed with overdrive being a much lighter vehicle by 1500lbs for max efficiency with the 4.0 you wanted rpm at 2200 rpm at 60 4.10 are most efficiency they were the best choice for 33 tire and 4.56 were the best ratio for 35s not saying the gladiator would have problems running 35 tires even with 3.73 since first gear is like 4.73 for the auto and 5.13 for the manual the rpms will be too low at 60 mph with .70 overdrive ever heard a diesel engine is most efficient at full throttle , max power for amount of fuel used , your fuel economy and power level will suffer of course you could just run in 5m or 7a . 1 stick by 3.73 for 31 4.10s for 33 and 4.56 with 35s for max efficiency . ever jeep believes this 3.73s for 245/75r17 4.10s for 285/70r17stock to boost fuel mileage .

you confused me there...

 

[Cburd61]

Hadn’t seen It mentioned, but, make sure you change both rear and front gears to the same ratio. Otherwise, you will have “binding” when in 4 wheel drive. If both front and rear axles don’t have the same ratio, they turn at different rpm’s, and you can break something that costs a lot more than you saved by just changing the rears.

 

[Artsifrtsi]

the carriers/housings were different and took a different set of gears. Not sure if they were thinking JL vs JT, or maybe something else.

Just the carrier and axle length are different. The center chunk is the same.

I can regear my D30/D35 in the TJ to a max of 4.88 (at least... maybe 5.13?) My TJ runs a 4.0l 6sp and 3.05 pushing 31's. Transmission is really low geared

 

[HorneyBadger]

Believe me, I have felt the difference between stock setup, with 33's and now with 35's. with 3.73 gears it is a turd unless you have a power commander. But still struggles up hills. Just a couple more days until the 4.56's are installed. If you are happy with your setup then more power to you. All the data points to the 4.56 or 4.88 if you want to stay in the power band with 35's.

Sponsored