Are 4.10s sufficient?

[Zandcwhite]

Reading through this and assuming this is all about the 4 Door? 2 Door Rubi owners seem happy with 4.10s and 35s.?

Far more 4 door owners are happy with their 4.10s and 35's than the few might have you think. I'd be willing to bet the numbers are 20-1 of people running 35's on 4.10s vs 4.88's. There's just no need, especially with the auto. The 1st gear is so much lower than it was in the JK that you'd have to gear a JK to 5.38 to get the same 1st gear ratio of a stock JLUR. Bottom line we have a much lower 1st gear and a much higher 2nd Overdrive so you can literally run just about any gear ratio and tire combination and it will still be better all around than a JK. A JK would need 3.31's to match the Overdrive ratio of a JL with 4.10s. Geared taller than the charts (based off much more limiting transmissions) recommend?Doesn't matter, thanks to the low 1st gear. Geared much lower? The double Overdrive still makes it reasonable at freeway speed. Long gone are the days where you either geared for the trails or for the freeway. The 8 speed let's you do both, almost regardless of axle gearing.

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[LOBBS]

I've got 35s on my 2dr JLR and I hate the factory 4.10s. I don't have a clue how people say that 35s, 37s, bigger are "fine" on stock gearing. I've been waiting since May on my rear gears from Quadratec (I've got the front gears and install kits) but I just found out that the supercharger kit off our company owned Gladiator is up for sale on a steal of an employee discount. If I can't get gears soon I just may throw more power at it.

 

[LOBBS]

Reading through this and assuming this is all about the 4 Door? 2 Door Rubi owners seem happy with 4.10s and 35s.?

I'm not. I despise the 4.10s and 35s.

 

[jbcrane]

Ill try to make it straight and quick
I have a willy’s with 35s and the gearing is very bad, it’s not a pleasure to drive anymore
Thinking of trading it in the spring, are the 4.10s really that much better?
i live at about 800ft

If you like your Willys and not your gears, re-gearing to 4.56 or 4.88's is the quick and obvious fix. It'll run between $2K-$3K depending on who does it. If you just want a Rubicon instead of a Willys and you eventually go to 35's - you'll run into (almost) the same conundrum: 4.10's are 'fine' until you drive a Jeep geared with 4.56's. So... you'll end up spending a ton on a new Rubicon thinking that'll solve all your problems, and wind up back in the same boat a year later and thousands of dollars poorer. Opinion: 35's thrive around 4.56 and with 4.88's your Jeep is fun again. Save the money you'll lose on buying a new Jeep, stick with your Willys with a re-gear.

 

[dragoneggs]

The stock gearing is terrible on non-rubicon models. You have the same effective drive ratio as a stock Rubicon with 4.10's and 37's. If you plan to run 35's anyway, you want the other Rubicon goodies, and never plan to go any larger, just order your new Rubicon with the XR package. 4.56 gears and 35's from the factory with better brakes, upgraded front axle, steel knuckles, and upgraded spare tire mount. Personally I prefer the higher side of gearing as I do drive 80+ on the freeway regularly so I think the 4.56's are borderline with the 35's on our 2022 JLUR with XR package. Not so low that it doesn't work but I definitely wouldn't order the 4.88's for 35's personally. For my use, I'll be happier with the 4.56's and 37's.

All sounds good unless you want/own a 2dr.

 

[Crowbar]

4.10's are not adequate with 35's. Regear to 4.88's.

 

[dragoneggs]

I'm not. I despise the 4.10s and 35s.

On a 2dr... why?

 

[c20040215]

This is a good video.

 

[Aquastream]

If you like your Willys and not your gears, re-gearing to 4.56 or 4.88's is the quick and obvious fix. It'll run between $2K-$3K depending on who does it. If you just want a Rubicon instead of a Willys and you eventually go to 35's - you'll run into (almost) the same conundrum: 4.10's are 'fine' until you drive a Jeep geared with 4.56's. So... you'll end up spending a ton on a new Rubicon thinking that'll solve all your problems, and wind up back in the same boat a year later and thousands of dollars poorer. Opinion: 35's thrive around 4.56 and with 4.88's your Jeep is fun again. Save the money you'll lose on buying a new Jeep, stick with your Willys with a re-gear.

This is great thanks, and the reason i started this thread.

I do want the rubicon for reasons other than gearing ?. But, re gearing a new jeep would be a pain in my butt.


Does anyone think that Jeep will offer 4.88s with the 2.0L eventually?

 

[LOBBS]

On a 2dr... why?

I have no tolerance for lost performance and driveability. I grew up with hot rods and muscle cars and work in the performance aftermarket. Proper gearing is just something you do and I don't understand why so many are adamantly against it in the off-road world. No matter what anyone says, if you go up in tire size along with added weight in doing so, you're taking a hit to acceleration, mileage and overall driveability. It's mathematically impossible not to. If you look at the gear ratios most often recommended when going to 35s, 37s or larger tires it could be argued that the Rubicon on factory 33s and 4.10s is slightly undergeared. I've taken several long road trips since going to 35s (I've put 20k miles on my Jeep since May) and I'm tired of losing 8th gear on long stretches especially when traveling from the Midwest to elevation. I'd hazard to guess that if I had been able to re-gear this spring when I originally placed my order that I would have hung on to 8th gear at least twice as long and as often. In day to day driving, acceleration has taken a noticeable hit and that's with doing everything I could to minimize the impact of going to 35s (my new wheels are 1lb heavier than factory and I went with KO2S that are only 12lbs more than the factory 285s). Mileage is down a full 1-2 mpg as well.

 

[jbcrane]

I do want the rubicon for reasons other than gearing ?. But, re gearing a new jeep would be a pain in my butt.

It's no big deal, really - as long as you have a reputable shop do the work. I was in and out - and broken in - in a day (obviously didn't do the work myself). Good opportunity to change out diff covers too (which I did myself). The only thing resembling a hassle (and it's really not) is the 500 mile fluid change, and that's a piece of cake. Trust me - if I can do it, you can do it ;-).

Does anyone think that Jeep will offer 4.88s with the 2.0L eventually?

No one knows... but given how 'selective' Jeep seems to be optioning their configurations - and supply chain woes - I'd bet against it. But could be dead wrong.

 

[CarbonSteel]

I've got 35s on my 2dr JLR and I hate the factory 4.10s. I don't have a clue how people say that 35s, 37s, bigger are "fine" on stock gearing. I've been waiting since May on my rear gears from Quadratec (I've got the front gears and install kits) but I just found out that the supercharger kit off our company owned Gladiator is up for sale on a steal of an employee discount. If I can't get gears soon I just may throw more power at it.

If you have ever driven a properly geared (not over-geared) Jeep it will become instantly apparent why 4.10s and 35/37" tires are not "fine"...

 

[Antonio]

Back when i ordered my 16” rubi unlimited that was a factory option to upgrade to 4.10 gearing for like $ 500/600 or something like that which made it an easy decision to add to the build, I ended up running 35” on it as I didn’t want to go to 37” at the time due to lift setup etc I can say for the six years I owned it, it was a great fit for both daily driving and off-road

 

[Aquastream]

It's no big deal, really - as long as you have a reputable shop do the work. I was in and out - and broken in - in a day (obviously didn't do the work myself). Good opportunity to change out diff covers too (which I did myself). The only thing resembling a hassle (and it's really not) is the 500 mile fluid change, and that's a piece of cake. Trust me - if I can do it, you can do it ;-).


No one knows... but given how 'selective' Jeep seems to be optioning their configurations - and supply chain woes - I'd bet against it. But could be dead wrong.

I didn’t mean a pain in the butt to do the swap- i mean i don’t like the idea of putting a brand new jeep in the shop for re gearing no more than i do to revive my current willy’s in the same way

It makes me scratch my head why even they jumped all the way to giving 4.88s as an option and skipped over 4.56.. not to mention it’s only available on the V6 ?‍

I think i’ll valiantly play the waiting game in hopes that will change within 6-8 months.

I’m pretty well turned from my black Willys right now. Shitty driving experience from these gears may well be the biggest factor in that ?‍

 

[jbcrane]

I’m pretty well turned from my black Willys right now. Shitty driving experience from these gears may well be the biggest factor in that ?‍

That's too bad... and not what we want out of our Jeeps for sure. I get it. There was a moment between lifting and going to 35's - and re-gearing - that I thought, Oh no... what have I done?! But once I got in and drove the 4.88's the smile returned to my face and it hasn't left. It's that big a difference. Life's short. Drive what you really want.

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