have you regeared?

[travis304]

4.56's on 35's with V6 / 8-speed. 4.56 gears keep RPMs reasonable and highway speed reasonable.

4.88's and especially 5.13's make high RPMs and heat above 70 MPH. Can also feel twitchy moving from a standstill. Plenty of acceleration and power with 4.56.

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[3TV]

4.56's on 35's with V6 / 8-speed. 4.56 gears keep RPMs reasonable and highway speed reasonable.

4.88's and especially 5.13's make high RPMs and heat above 70 MPH. Can also feel twitchy moving from a standstill. Plenty of acceleration and power with 4.56.

I have 4.88 gears and 37's on my 2.0T auto-trans 2-door JL. At 85 mph on the interstate, the engine is running at 2,600 RPM. Gearing feels just right to me. I would suspect 4.56 gears and 35s would turn similar RPMs.

 

[X35]

I have 4.88 gears and 37's on my 2.0T auto-trans 2-door JL. At 85 mph on the interstate, the engine is running at 2,600 RPM. Gearing feels just right to me. I would suspect 4.56 gears and 35s would turn similar RPMs.

You hit the nail on the head. 4.56 and 35’s on my 3.6 auto trans Willys XR is right around 2,500 RPM at 85 MPH and feels very comfortable at that speed. Not that I run there much but it also doesn’t take much to get there and not realize it when keeping up with local highway traffic.

 

[wreck99]

Just got back from the shop after having 37's installed. I'm honestly surprised it doesn't feel much more sluggish than before on 35's. Of course I haven't done a lot of driving with these yet but so far so good on the highway coming home. The RPMs were around 2100 at 70mph in 6th. I am still on the 4.10 gears. I need to drive it in the hills, and I have a wheelin trip coming up on Saturday, so I'll see how it is under other conditions.

 

[lowmpg]

Just got back from the shop after having 37's installed. I'm honestly surprised it doesn't feel much more sluggish than before on 35's. Of course I haven't done a lot of driving with these yet but so far so good on the highway coming home. The RPMs were around 2100 at 70mph in 6th. I am still on the 4.10 gears. I need to drive it in the hills, and I have a wheelin trip coming up on Saturday, so I'll see how it is under other conditions.

4.10's will feel fine, until you go to 4.88 and you realize how sluggish it actually was. I was in the same boat, enjoying the 4.10 and driving around with 37's. I didn't notice a big drop off and thought all the people talking about regearing were just doing it because others did it. Until I actually had 4.88s installed, total response difference. That said, probably no issue at all driving around with 4.10s.

 

[embedded rock]

Satisfied with the 4.56 and 35" tires that came with the Xtreme package.

 

[wreck99]

Not yet, and may not ever. We will see. Currently on 35's at 4.10 in the manual. No issues on or off road. Going to 37s next week and going to see how it feels before deciding to regear. I'm told I probably won't need it but we will see how it feels. My initial thoughts...current tires are 75 lbs a piece and new tires will be 80 lbs a piece. Not a big jump. I may not feel it.

4.10's will feel fine, until you go to 4.88 and you realize how sluggish it actually was. I was in the same boat, enjoying the 4.10 and driving around with 37's. I didn't notice a big drop off and thought all the people talking about regearing were just doing it because others did it. Until I actually had 4.88s installed, total response difference. That said, probably no issue at all driving around with 4.10s.

I ended up regearing 4 months later and happy I did. It was the little things that piled up to my decision. It was sluggish by comparison and now I can really feel the difference. I got so used to the feel from 35's, that the 37's didn't change it much. I felt like the jump from 33's to 35's was bigger with regard to performance. That's when the shifting points changed. With the 4.10's, I could do everything without much trouble and I just adjusted driving style. However things like clutch chatter, not being able to pass on the highway in the hills, adaptive cruise feeling near useless, and terrible gas mileage were the kicker. Now I'm in the break-in period (~200 miles in) and so far I'm seeing 16-17 mpg combined vs the 12-14 I was getting before. I can accelerate at 45mph in 6th gear lol, something not possible before, and the clutch chatter is gone.

 

[CorvZ061]

I ended up regearing 4 months later and happy I did. It was the little things that piled up to my decision. It was sluggish by comparison and now I can really feel the difference. I got so used to the feel from 35's, that the 37's didn't change it much. I felt like the jump from 33's to 35's was bigger with regard to performance. That's when the shifting points changed. With the 4.10's, I could do everything without much trouble and I just adjusted driving style. However things like clutch chatter, not being able to pass on the highway in the hills, adaptive cruise feeling near useless, and terrible gas mileage were the kicker. Now I'm in the break-in period (~200 miles in) and so far I'm seeing 16-17 mpg combined vs the 12-14 I was getting before. I can accelerate at 45mph in 6th gear lol, something not possible before, and the clutch chatter is gone.

what gear ratio did you go with?

 

[wreck99]

what gear ratio did you go with?

4.88

 

[Jeep Junkie]

Guys, gear shop told me that higher you go the weaker the thingies in your gears get.

 

[Bryce]

Going from Stock 275/70R17 to 315/70R17 on a Rubicon didn't make much difference to me. No plans to go with larger tires.

 

[grimmjeeper]

Guys, gear shop told me that higher you go the weaker the thingies in your gears get.

Not true.

All gear ratios have the same spec for torque handling according to the engineers at Dana.

People repeat a lot of garbage they hear on the Internet because they don't actually take the time to study the subject.

 

[Jeep Junkie]

Not true.

All gear ratios have the same spec for torque handling according to the engineers at Dana.

People repeat a lot of garbage they hear on the Internet because they don't actually take the time to study the subject.

And that's why I didn't go with 5.13

 

[grimmjeeper]

And that's why I didn't go with 5.13

Remind me. What engine, trans, and tire size?

 

[Jeep Junkie]

Remind me. What engine, trans, and tire size?

2024, 3.6L, 8 spd, 37's, 2 door, Willys

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