[Norminator]

I just learned recently that there are two axle ratio options. I thought I would open a thread for discussion.

 

[elff]

OOOOOO
Yes, I knew this about the new JL392. With the added power of the 392, it makes sense to pull some gearing to avoid carnage.

I thought you were referring to the TJ Rubicon's and that had me totally confused.

OK all better now

 

[Norminator]

I didn’t even know about the 392 option. I need to get out more.

 

[elff]

Its pretty awesome.

 

[DK2014JK]

I'm pretty sure with the JK Rubicons the manual came in 4.10, auto was 3.73, auto with the tow package was 4.10.

I didn’t even know about the 392 option. I need to get out more.

Have you heard about the 4xe? 470 ft. lbs. of torque sounds like fun.

 

[rlenglish]

I thought JKR all had the 4.10, I should ask one of our sales people but I like to avoid them.
My JKUR does not have trailer tow and has 4.10's.
We cannot even order 392' yet, just another thing you southerners have over us.
The Mojave edition Gladiator has the beefed frame and cast knuckles also.

 

[Norminator]

I envied my neighbor’s truck until I saw him pay $1000 for one taillight. But I’m open. Learning about all the new is going to be a marathon and not a sprint.

 

[16rubicon]

I'm pretty sure with the JK Rubicons the manual came in 4.10, auto was 3.73, auto with the tow package was 4.10.



Have you heard about the 4xe? 470 ft. lbs. of torque sounds like fun.

The 4xe is super interesting. Really want to check one out.

For the gears, I actually have the max tow package in my 2016 rubcion. But I have 3.73 gears.

my understanding:
Rubicon has 4.10 but it’s a manual.
want auto? Pay extra but get 3.73. You can pay extra for 4.10’s.
Or you can pay extra for max tow package but that will have 3.73’s, and you can choose to pay extra again for 4.10’s.

I have never bought a Jeep new. I was there when my dad bought his rubicon, and I recall (but could be incorrect) he had to go thru the above process.

My 2016 was used, 30k miles, and has “max tow”, at least according to build sheet, auto, and 3.73.

Entirely possible the original buyer specifically wanted 3.73’s and max tow, but I saw a lot of JK rubicon’s for sale when I was looking to get a used one a year ago and every one of them was 3.73. About a third of them had max tow and all had listed 3.73 gears, the ones I checked the build sheet on also confirmed mine wasn’t abnormal for my area at least.

Stupid though, I wish they all had 4.10’s.

 

[Norminator]

My TJ came with 4.10 on 31’s and is now on 33’s like the engineers designed it. What size tires are they putting on now?

 

[16rubicon]

My TJ came with 4.10 on 31’s and is now on 33’s like the engineers designed it. What size tires are they putting on now?

JK rubicon’s come with 32 BFG KM’s.

JL rubicon’s come with 33’s, and all the JL rubicon’s seen have the high top front fender flares and, what seems like, oddly enough standard height rear flares. Must not be an issue. Unsure on tire type.

 

[DAA]

Our '19 JLU 2.0L/turbo came with 285 KO2's and 4.10 gears. But I had 315's put on before taking delivery. With the etorque it chirps the tires on accident at take off if you give it just a little bit of throttle and the little turbo spools right up and it can take off pretty good.

One of my buddies has a loaded 4xe ordered. Not supposed to take too awful long, I think he should have it in like six weeks.

My LJ with the six speed on 35's is geared with 4.88's. Which is about like 5.37's on the auto or 5.13's on the five speed manual. I've never regretted the low gearing. And I run at 80MPH for hours at a time often.

- DAA

 

[rlenglish]

Jeep claims you are going to be able to order 35's stock. (315/70/17)
Have you seen the promo video's regarding electrification. Park your Jeep, go for a hike the let it auto drive of road to come pick you up. Lie in the back with your girl while it off roads for you and you can look at the stars.

 

[16rubicon]

The 4xe is super interesting. Really want to check one out.

For the gears, I actually have the max tow package in my 2016 rubcion. But I have 3.73 gears.

my understanding:
Rubicon has 4.10 but it’s a manual.
want auto? Pay extra but get 3.73. You can pay extra for 4.10’s.
Or you can pay extra for max tow package but that will have 3.73’s, and you can choose to pay extra again for 4.10’s.

I have never bought a Jeep new. I was there when my dad bought his rubicon, and I recall (but could be incorrect) he had to go thru the above process.

My 2016 was used, 30k miles, and has “max tow”, at least according to build sheet, auto, and 3.73.

Entirely possible the original buyer specifically wanted 3.73’s and max tow, but I saw a lot of JK rubicon’s for sale when I was looking to get a used one a year ago and every one of them was 3.73. About a third of them had max tow and all had listed 3.73 gears, the ones I checked the build sheet on also confirmed mine wasn’t abnormal for my area at least.

Stupid though, I wish they all had 4.10’s.

Also, at least for the dealerships local to me, they no longer regear, even factory options. I’m unsure if that’s how they all are now, or not. They used to regear any factory option.

So at least for me, my next Jeep, if I go new, I may have custom build online to get the gears I want. (wife wants my Jeep. Can’t justify having both our vehicles be a 2 door so it’ll be a 4 door rubicon)

 

[16rubicon]

Jeep claims you are going to be able to order 35's stock. (315/70/17)
Have you seen the promo video's regarding electrification. Park your Jeep, go for a hike the let it auto drive of road to come pick you up. Lie in the back with your girl while it off roads for you and you can look at the stars.

My understanding is the rubicon’s, with the high top front flares, and the advantek Dana 44’s they are perfectly capable of 35’s stock with nothing else. Guys on forums seem to not be strengthening the front or rear axle, and the tubes for the front are stronger and the end forging are as well.


I’d be surprised if the current wheels have enough backspacing to clear 35’s but they might, I don’t know myself.

 

[Al_S]

To add a little more confusion to this thread, the Jeep Gladiator Rubicon with diesel engine only comes with auto and 3.73 ratio. 3.6 gas engine Gladiator Rubicons are available with 6 speed manual or 8 speed auto and have 4.10 axle ratio.

 

[Norminator]

I’m surprised dealerships ever agreed to re-gear. Doing the service or not had to be a pure business decision. I was a truck driver, but around enough management to know when they start or stop salivating for an angle.

Adding confusion to the thread? Go for it. I just opened the lid of the box. I can’t control what’s inside. Besides, it‘s nice to have us all talking outside of our usual thread groups.

 

[rlenglish]

One of the girls i work with has 35's on her JLR. She thrashes it pretty hard and they don't seem to rub anywhere. She does have aftermarket wheels though and I don't know what wheels Jeep will use for 35's.

The Advantek axle is stronger all around than the 44 used in the JK. I recently put 4.88's in one but I do not recommend it. The axle center section is smaller and as a consequence the ring and pinion are smaller. I would not go past 4.10 because I think if you shock loaded it at all there would be damage.

 

[Norminator]

People seem to be carrying more weight these days too. Roof top tents are almost common.

 

[elff]

The new Big Bronco has the Advantek axles in it. The Sasquatch package comes with the M210 front and M220 rear with 4.7 gears. They have beat the crap out of them in a bunch of different situations and seem to be pretty stout.

Wusses, I remember camping on the ground.

 

[Mouse]

The Advantek axle is stronger all around than the 44 used in the JK. I recently put 4.88's in one but I do not recommend it. The axle center section is smaller and as a consequence the ring and pinion are smaller. I would not go past 4.10 because I think if you shock loaded it at all there would be damage.

I consider the FAD to be a weak point that the JK axles do not have. Fortunately you can buy one piece axle shafts to remedy it if you are so inclined.