Regear or Not

[Xerx]

Question still new to the community and learning here, but I currently have 2024 Willys with the 4.10 &33s. Above someone stated you can do 37’s with the 4.10’s. I live in south Texas so beaches and occasional crawling are in line. Can I get away with 37’s if not I have been looking at 35’s. I went to the Jeep Academy back in April and the Jeep rep said I could get away with 35’s and possibly 37’s with a lift. I’m just trying to prepare for my build. I was thinking 2.5 lift with 35’s but heck if I can do the 37’s with a 3.5 that would be even better.
Thanks for any feedback.

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[grimmjeeper]

Question still new to the community and learning here, but I currently have 2024 Willys with the 4.10 &33s. Above someone stated you can do 37’s with the 4.10’s. I live in south Texas so beaches and occasional crawling are in line. Can I get away with 37’s if not I have been looking at 35’s. I went to the Jeep Academy back in April and the Jeep rep said I could get away with 35’s and possibly 37’s with a lift. I’m just trying to prepare for my build. I was thinking 2.5 lift with 35’s but heck if I can do the 37’s with a 3.5 that would be even better.
Thanks for any feedback.

It's not ideal but especially in south TX, 37s and 4.10s will still get you around well enough. Especially if you don't crawl big rocks a lot.

Try it for a while without regearing. If you don't like it, either step the tire size down or regear.

 

[Xerx]

Thanks, I’ll just stick to 35’s to be on the safe side. In time I’ll go up. Just gotta save more later. Or maybe get the 3.5” with 35’s for eventual swap in gear in time.

 

[grimmjeeper]

Thanks, I’ll just stick to 35’s to be on the safe side. In time I’ll go up. Just gotta save more later. Or maybe get the 3.5” with 35’s for eventual swap in gear in time.

Yeah. It doesn't hurt to do things in stages. You learn the most off road by having a Jeep closer to stock. I got started with an XJ on 30" tires and no lockers. I really had to develop my driving skills to keep up. That has served me well.

 

[JeepViking13]

Gearing absolutily makes a difference. There's a reason Jeep puts 4:56 gears in the Xtreme Recon from the factory with 35 inch tires and also offers 4:88s.

I couldn't imagine the Sports 3:45 gears for example in my Jeep runing 35s+. There would be lack of acceleration, it would feel like a dog offroad and the gas mileage would suck.

 

[grimmjeeper]

Gearing absolutily makes a difference. There's a reason Jeep puts 4:56 gears in the Xtreme Recon from the factory with 35 inch tires and also offers 4:88s.

I couldn't imagine the Sports 3:45 gears for example in my Jeep runing 35s+. There would be lack of acceleration, it would feel like a dog offroad and the gas mileage would suck.

The automatic is really good at compensating for mismatched gears and tires so you don't notice it as much as you used to in previous generations of Jeeps.

It's still a good idea to get the right gears for the tires. Just less urgent.

 

[JeepViking13]

The automatic is really good at compensating for mismatched gears and tires so you don't notice it as much as you used to in previous generations of Jeeps.

It's still a good idea to get the right gears for the tires. Just less urgent.

For sure the JL 8 speed Torqueflite automatic transmission makes a diffrence and makes it at least possible. I just wouldnt be happy with the performance.

The old Jk 5 speed automatic transmission was a dog and almost undrivable when going with bigger tires and not changing gears.

 

[Twisted10]

392 w 456's gives 0 fucks about 38's

 

[Zandcwhite]

For sure the JL 8 speed Torqueflite automatic transmission makes a diffrence and makes it at least possible. I just wouldnt be happy with the performance.

The old Jk 5 speed automatic transmission was a dog and almost undrivable when going with bigger tires and not changing gears.

See post #4 in this thread...4.88s and 37s have identical acceleration to 4.10s and 37s. Depending on which JK 5 speed you're referring to it either had a 2.86 1st gear or a 3.59 if it was a late model. Even with the better late model 5 speed the 3.45s paired to the 8 speed are equivalent to running 4.56 gears in the JK. That's why so many are perfectly happy with their stock 3.45s and 35s... it's what you would have regeared a JK to to run 35s already. And if you have the misfortune to remember driving a 3.8L JK with the 2.86 1st gear, you'll never think the JL needs more gearing. That garbage would need 5.67 axle gears to match a JL with 3.45s. Everyone complains about how bad the 3.8L was, but in reality it was the terrible transmission. The 8 speed has all the gearing you could ever need on and off road, especially in a Rubicon with a 4-1 transfer case. If you want quicker acceleration you need to add power not gearing.

 

[Xerx]

Yes, I have the 3.6 with 8 speed a

 

[grimmjeeper]

For sure the JL 8 speed Torqueflite automatic transmission makes a diffrence and makes it at least possible. I just wouldnt be happy with the performance.

The old Jk 5 speed automatic transmission was a dog and almost undrivable when going with bigger tires and not changing gears.

Try it with a 32RH in a TJ. You would think the JK 5 speed was amazing by comparison.

 

[Zandcwhite]

Try it with a 32RH in a TJ. You would think the JK 5 speed was amazing by comparison.

2.7 1st gear and no overdrive. You couldn't hear it low enough for crawling, and if you did it would have a to speed of ~50mph. Maybe it's all the years of wheeling with some garbage transmissions that I really don't care about regearing with the 8 speed. Although I did jump the shark and try super deep gears and even with the 2 overdrives it was worse than 4.10s and 37s. 8th gear by 40mph and nowhere to go from there.[/QUOTE]

 

[grimmjeeper]

2.7 1st gear and no overdrive. You couldn't hear it low enough for crawling, and if you did it would have a to speed of ~50mph. Maybe it's all the years of wheeling with some garbage transmissions that I really don't care about regearing with the 8 speed. Although I did jump the shark and try super deep gears and even with the 2 overdrives it was worse than 4.10s and 37s. 8th gear by 40mph and nowhere to go from there.

Yeah, whoever convinced you to go with 5.38s did you wrong. That's for sure.

I'm building an 83 CJ7 now. T176 4 speed manual. No overdrive but a fair first gear. Still, I'm going with 3.54s (up from stock 2.73s) to run 31s. Gonna be ~3K RPMs at 75. But I'll rarely get it going that fast. And it won't be a super crawler. But I have other Jeeps for that.

 

[TyRoosevelt]

These posts get annoying because almost everyone who chimes in doesn’t answer the question. I have 37s with 4.56 from the factory with the 2.0. It drives outstanding. It feels no different at all from 4.56 with 35s to 37s. If you had 4.10s, I would maybe tell you to regear. 5.13s is excessive for 37s and since I am speaking from personal experience, I am telling you its ridiculous when I hear people say its better. They regeared it wrong and then they try and justify their decision to not feel stupid.

btw, I see 8th gear all the time even going up hill in the Colorado mountains. I even saw 8th gear with the 4.10 with 37s fairly consistently.

 

[JT1]

These posts get annoying because almost everyone who chimes in doesn’t answer the question. I have 37s with 4.56 from the factory with the 2.0. It drives outstanding. It feels no different at all from 4.56 with 35s to 37s. If you had 4.10s, I would maybe tell you to regear. 5.13s is excessive for 37s and since I am speaking from personal experience, I am telling you its ridiculous when I hear people say its better. They regeared it wrong and then they try and justify their decision to not feel stupid.

btw, I see 8th gear all the time even going up hill in the Colorado mountains. I even saw 8th gear with the 4.10 with 37s fairly consistently.

In all fairness, the only engine 5.13s and 37s is the normal answer for is the 3.6. The 2.0 has more torque down low and boost helps.

If I bought an XR with a 2.0 and wanted to run 37s, I wouldn't regear. If I bought a sport with 3.45s and a manual and I wanted to run 37s, the answer would be different.

The 3.6 is utterly gutless until 1900 rpm, with the 2.0 it's already deep in boost by there.

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