Wrangler 392 on 33s and 3.73 Gears?

[Smess]

AEV has been doing 6.4 with 44’s back as far as 2012. Jeep had all the testing done for them just like the Gladiator which was AEV’s double cab brute.

just like the Brute to Glad the JL TO jL 6.4 if you follow what the price to convert was and reduce it by 65-75% we have a pretty good idea of what a 392 will cost.

and yes if you order one with no pricing out yet then you clearly dont care what it costs.

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[SCJeeps]

It seems to me that the 392 selection of 3.73 and 2.72 std transfer case are to keep max wheel torque in check.
Current max torque on std Rubicon- 295lb-ft x 4.71 (1st gear) x 4.0 (transfer case) x 4.1 (rear ratio) = 22,786
For the 392 - 470 x 4.71 x 2.72 x 3.73 = 22,459

If the 392 had a 4:1 transfer case and 4.1 the ratio skyrockets: 470 x 4.71 x 4 x 4.1 = 36,304

This is on top of the fact that all modern cars typically use torque management, so it is not likely you can even reach these torque limits as the system will limit torque in specific gears. So what would be the point of having the deep gears if the system would pull timing to reduce torque.

 

[kcchiefs]

I ordered my 392 today and there was no gear option. Yes AEV did 4.10's with the 6.4's but remember the manufacturers have to have an average mpg across the board for all vehicles in their line up. That is probably another reason for the 3.73. You cant compare the gearing in the different HP models, don't ask me why I never understood it.

What I can tell you for sure is your 285 which is 32.7 with a 3.73 will be perfect. I had a 4.10 in my gas Glad and 35's and it was perfect and I probably could have snuck 37's on there and not re-geared so I can assure you that the 285 and 3.73

Common mistake people make is buying a sport or Sahara/overland and then add a lift and tires and gears and when they are all done if they had just got a Rubicon they would have everything they need including lockers. If you get a sport with cloth and wind up windows and basic stereo than that's a different story.

How did you order? It is not available yet.

 

[Smess]

Watch the video they are in production already jan delivery. Dealer called yesterday morning and said it opened up he only gets 3 units to start. Sent me options list and places order

 

[Mac]

You will definitely notice a drop in mpg and power, I have 4.10s and went from stock tires just under 32” to 34” tires and there is a noticeable difference.

 

[Smess]

Get the edge pulsar and get 30 more horse. I had on my gasser and was great

 

[Smess]

[QUOTE="Orange01z28, post: 602573, member: 33071"

I'm much more worried about the D44s themselves with the 392 as opposed to the gear ratio, especially as people put larger tires on and go wheeling.

*poof*
[/QUOTE]

that's like saying a humans blood vessels that have high bp will explode because the blood vessels are not strong enough, no they have heart attacks. I have been running the dog shit out of a 44 with stock 4.10's and stock gears with a 5.7 for 10 years and never a problem. Poof will be the gears not the 44 its just a shell for the insides to run and move in just like the typical human blood vessel.

Anyone that can afford a 392 can afford a 7/100 extended so drop the poofer at the dealer and tell them to fix but I doubt that will happen as most of the diffs we here poofing are from re-gears by aftermarket clowns that don't know how to install properly not stock stuff engineered to handle the environent they were built to run in.

poofers are not the 44 axle housing unless they are sleeved incorrectly, my rear 44 that takes the load is still running like a champ but my poorly sleeved front axle was replaced at 14k with a dyna. after we heard the metal on metal sound and knew it would be a matter of time before we had a poofer.

when the JK was introduced the 44 axle was widened but not strengthened and there were failures especially when larger and heavier tires are run but I am sure that issue has been addressed since 2007 and JT's and JL's got an even wider axle so I am sure Jeep learned from the 2007 mistake.

 

[MRW]

The Hemi Wrangler uses a different transmission then the 6 cylinder Wrangler so you need to take that into consideration. I run 35's with 4:10s on my 6.4 swapped Gladiator (has the trans used in the 3/4 ton trucks). I would prefer 3:73's. Next set of tires will be 37's and I expect it would still run better on 3:73's. The power in the 6.4 changes everything that you have read about gearing and tire sizes in a Wrangler.

 

[DaveFrat]

You should be just fine with 3.73 gears and 33's. The 8-speed automatic is a game-changer.

I have 315/70 18 (35.5”x12.4/18)on my overland with the 3.73 gears. It runs fine on road and fine off road for moderate trails. Still gets me 18mpg if I don’t get on it and does 75+ just fine.

 

[Deleted member 30519]

You should be just fine with 3.73 gears and 33's. The 8-speed automatic is a game-changer.

Don't seem like much of game changer to me coming from an auto JL to manual JT.

 

[Boogerman]

Hello,

It was to my surprise to hear about the Wrangler 392 having 3.73 gears with 33 inch tires (assuming 285/70/17). In my own current situation, I am in the market for tires for my Gladiator Sport with 3.73 gears. Hearing that the 392 will have 33s gave me some comfort that even from the factory, Jeep will put 33s on 3.73s. This gave me comfort that 3.73s will be okay on the 285/70/17 tires that I plan to put on them. Although, I read that this is being done on the 392 because the extra power/torque allows for 4.10s to not be needed on the 392. Does anyone know how much of this is true/accurate? Am I wrong for feeling more comfortable with 285/70/17 on 3.73 because Jeep just did it with the 392? I just am unsure how much an impact that power will actually make. Is the V6 and the 8 speed capable of rolling 285/70/17 for a long time while maintaining reliability? I have read so much about this, some people with JK's ran 3.73 with 35s and had no issues. Some ran JK's on 33s with 3.73 with issues. I understand that it is all about perspective and expectations, but overall this announcement made me feel better about my decision to go with 33 in. 285/70/17 tires on my Gladiator with 3.73 gears.

Any thoughts or comments would be appreciated. Thank you.

Sergio

I have 3.73 gears (JT Overland) with 35's, Still get decent gas mileage (17.5mpg-19.5mpg depending on my driving) and actually think its about as fast as when I first got it. I did drop from 18's to 17's and have C load K02's. I would think weight wise I may be close to original.

Hope that helps.

 

[JBOverland]

@DaveFrat @Boogerman do you have lifts or levels with those tires and MPG?

 

[DaveFrat]

@DaveFrat @Boogerman do you have lifts or levels with those tires and MPG?

2.5” lift with 35’s

 

[Boogerman]

@DaveFrat @Boogerman do you have lifts or levels with those tires and MPG?

Yes I have the JKS Mfg 3.5 inch lift

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