6th gear most of the time.

[Jakeyou]

I've got a 2022 JTRD with 37's (BFG 37x12.50x17 KM3's, and 2 inch Mopar lift, dealer installed, plus 4.88, dealer installed) , runs in 8th gear on the freeway, all the time, even uphill, at 75 mph+. Runs right at 2,000 rpm at 68 mph. Love it. Beautiful! Wouldn't bother with 4.56. This suits me just fine, until my Tesla Cybertruck arrives, then, it will instantly be, "Buh, bye, JT, hello CT3!"

The world's going all electric, and faster than anyone ever thought!

WooHoo! Love Elon Musk, baby!

I've got a 2022 JTRD with 37's (BFG 37x12.50x17 KM3's, and 2 inch Mopar lift, dealer installed, plus 4.88, dealer installed) , runs in 8th gear on the freeway, all the time, even uphill, at 75 mph+. Runs right at 2,000 rpm at 68 mph. Love it. Beautiful! Wouldn't bother with 4.56. This suits me just fine, until my Tesla Cybertruck arrives, then, it will instantly be, "Buh, bye, JT, hello CT3!"

The world's going all electric, and faster than anyone ever thought!

WooHoo! Love Elon Musk, baby!

Cybertruck looks like Geoff from top gear.

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[Gvsukids]

The live settings aren’t worth the bugs that come with them.

What bugs? I haven't had any.

 

[WILDHOBO]

What bugs? I haven't had any.

Reverse lights stuck on when unlocking with fob instead of proximity, brake hold malfunction that leaves the brakes stuck partially on. Those two happened in the first week. Since tire size, gearing, and TPMS settings are fixed, I set them, removed the Tazer, hooked wires back up to Jeep, and stored it in the glove box. No issues after. Left it married. And yes, I’m on the most current firmware.

 

[Glad_he_ate]

We had a Cherokee limited with the 9 speed trans and the 3.6 fully stock. And I thought they labeled the window sticker wrong. It would never not one time in 2 year hit 9th. I could force a shift if going 78 downhill in manual. But soon as I hit flat land it would kick to 8th. 3.6 didn’t have enough ass to keep the thing moving…

 

[WILDHOBO]

We had a Cherokee limited with the 9 speed trans and the 3.6 fully stock. And I thought they labeled the window sticker wrong. It would never not one time in 2 year hit 9th. I could force a shift if going 78 downhill in manual. But soon as I hit flat land it would kick to 8th. 3.6 didn’t have enough ass to keep the thing moving…

Strange. We had a 2014 Cherokee Trailhawk with the 9 speed and 3.2 and it hit 9th all the time on flat highway.

 

[Fox940]

Let me act like an old man and say "Get off my Lawn". I'm a Gen X'r and grew up in the 80's reading 4 Wheeler and Peterson's Off Road magazines. You do not need big ass tires for a good off road vehicle. You need low gears. For years and years and years there were Willys Jeeps, International Scouts, Ford Hi-boys, etc. out running around off road and they got around just fine on their skinny tires. If you want to put big ass tires and lifts go for it. Just make sure you put lower gears to compensate and I'll catch flack for this, but a Dana 44 should only have 35 inch tires max. Move up to a Dana 60 if you want larger tires.

 

[WILDHOBO]

Let me act like an old man and say "Get off my Lawn". I'm a Gen X'r and grew up in the 80's reading 4 Wheeler and Peterson's Off Road magazines. You do not need big ass tires for a good off road vehicle. You need low gears. For years and years and years there were Willys Jeeps, International Scouts, Ford Hi-boys, etc. out running around off road and they got around just fine on their skinny tires. If you want to put big ass tires and lifts go for it. Just make sure you put lower gears to compensate and I'll catch flack for this, but a Dana 44 should only have 35 inch tires max. Move up to a Dana 60 if you want larger tires.

Another gen X’er here. I won’t give you flack, and I agree that older Jeeps need nothing larger than 35’s. But wheel bases are longer than they were in the 80’s and 90’s. Meaning break over angles need larger tires in order to get the same ground clearance. On a 2 door wrangler, you’re right all day long though. These new Dana 44’s are better than those of old. With minor shaft and gear upgrades, they can easily handle 37’s in my opinion. At 40’s I’d go up to Dana 60’s.

 

[BumbleBee]

I've got a 2022 JTRD with 37's (BFG 37x12.50x17 KM3's, and 2 inch Mopar lift, dealer installed, plus 4.88, dealer installed) , runs in 8th gear on the freeway, all the time, even uphill, at 75 mph+. Runs right at 2,000 rpm at 68 mph. Love it. Beautiful! Wouldn't bother with 4.56. This suits me just fine, until my Tesla Cybertruck arrives, then, it will instantly be, "Buh, bye, JT, hello CT3!"

The world's going all electric, and faster than anyone ever thought!

WooHoo! Love Elon Musk, baby!

Elon Musk,,, what a terd...

 

[ShadowsPapa]

Tazer has live options that aren't on jscan. Tazer also receives updates.

Jscan can do anything except things that aren't an option in the system modules. It can change any settings, but can't do live things like kill ESS each time you start the truck, kill the license plate lights in reverse, etc. But if it's an option in the module configurations, it will do it.
JSCAN also gets updates, as does AlfaOBD.

 

[NachoRuby]

I used jscan - I don't recall if it was a list of options or what,
but here is what the config says currently based on a log from AlfaOBD ->
Dynamic Tire Circumference (All or Rear) (0-65534 mm): 2508.000 mm

I started with the common measure like you said, but rolling diameter can be different (and is, as it's how indirect TPMS works) so I tweaked until things matched.

The dealership set mine. They only go to the nearest .5" with the "oversized tire" sales code. I have a tazer, but wanted it on my vehicle record that they set it.
My 35's are set at 34.5. 34 was too small, 35 was too much.

 

[ShadowsPapa]

I don't recall the exact increments but am pretty sure there were more choices than just whole numbers or half-way points.

 

[WILDHOBO]

I don't recall the exact increments but am pretty sure there were more choices than just whole numbers or half-way points.

Definitely. Mines at something like 35.94”

 

[NachoRuby]

I don't recall the exact increments but am pretty sure there were more choices than just whole numbers or half-way points.

There are. The dealership just doesn't use them with the sales code. It's in the memo from FCA, that they are supposed to go by when setting them. They have to use .5" increments. They aren't allowed to go in between. I guess to keep you from coming back to much to get too precise.

 

[Mac]

It’s fascinating how in gear or mileage discussions two different people can have very similar setups, same gears and tire size but complete opposite opinions of how it performs and what mileage they get.

 

[WILDHOBO]

It’s fascinating how in gear or mileage discussions two different people can have very similar setups, same gears and tire size but complete opposite opinions of how it performs and what mileage they get.

You’re not kidding. But things do vary by geographical area. I drive up 7% grades constantly and live at high elevation in a cold climate. My mileage will always be worse. People with less gearing and larger tires do better in warmer low elevation areas.

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