Regear or Not

[TyRoosevelt]

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.

I have had the 3.6 as well. I had it with 37s and I feel no difference than with the 2.0. Just out or curiosity, have you actually run the setup? And drove it for an extended period of time? People need to stop acting like they know what they are talking about without firsthand experience. Its going to cause someone to make an expensive decision they will ultimately regret. 5.13 is too much for the v6. 4.88 is better. I have had all 3.

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[grimmjeeper]

I have had the 3.6 as well. I had it with 37s and I feel no difference than with the 2.0. Just out or curiosity, have you actually run the setup? And drove it for an extended period of time? People need to stop acting like they know what they are talking about without firsthand experience. Its going to cause someone to make an expensive decision they will ultimately regret. 5.13 is too much for the v6. 4.88 is better. I have had all 3.

I have had a 3.6. Drove it for 8 years. So I know what I'm talking about. The 4.56 helped with the 315s (short 35s) but it really needed 4.88s. That 3.6 really is a gutless turd below 2,000 RPM.

The only way it doesn't suck with less than 4.88s on 35s is to have an automatic transmission with a torque converter that lets it get up to 2,000 RPM early. That's how they tuned it from the factory. It's the only reason people with the 3.6 think 4.10s are adequate with 35s.

 

[Zandcwhite]

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.

Bull shit. Well into boost by 1900rpm? Nope. The 3.6L makes more torque than the 2.0t until about 2200rpm because it's not into boost yet. And who cares if they are both gutless below 2300 rpm? You don't want/ need to be at peak torque or boost when cruising around at low loads which is the whole point of having 2 overdrives. Some people act like the thing takes more than a fraction of a second to downshift and get into the power/ boost.

 

[JT1]

I have had the 3.6 as well. I had it with 37s and I feel no difference than with the 2.0. Just out or curiosity, have you actually run the setup? And drove it for an extended period of time? People need to stop acting like they know what they are talking about without firsthand experience. Its going to cause someone to make an expensive decision they will ultimately regret. 5.13 is too much for the v6. 4.88 is better. I have had all 3.

I have a 6spd gladiator on 37s and 5.13s. The 3.6 in the JLs was tuned by incompetent space monkeys.

The 8spd covers up the <2000 rpm power deficit with more gears and a torque converter.

I wheel with a 2.0 rubi on 38s and 4.88s and thats a really nice combo all the way around.

I probably would have done 4.56s in mine if I had a rubi. The 4:1 transfer case and 4.56s is similar to the 2.72:1 and 5.13s crawl ratio wise. 4.56s in 5th gear is the same final drive ratio as 5.13s in 6th.

 

[TyRoosevelt]

I have had a 3.6. Drove it for 8 years. So I know what I'm talking about. The 4.56 helped with the 315s (short 35s) but it really needed 4.88s. That 3.6 really is a gutless turd below 2,000 RPM.

The only way it doesn't suck with less than 4.88s on 35s is to have an automatic transmission with a torque converter that lets it get up to 2,000 RPM early. That's how they tuned it from the factory.

Well if you had it for 8 years, then you must have had it with the JK. 4.88 makes sense for the 3.6. I had 37s with the 4.10 and it was fine. Not great but just fine. I regeared it to a 4.88 and it was fantastic. I had a jk with 37s and 5.13 and I hated it. In my opinion, obviously this is subjective, but I like the 4.56 with the 2.0 and 4.88 with the v6. It feels closest to stock to me. Not scientific of course. Just feel.

 

[JT1]

Bull shit. Well into boost by 1900rpm? Nope. The 3.6L makes more torque than the 2.0t until about 2200rpm because it's not into boost yet. And who cares if they are both gutless below 2300 rpm? You don't want/ need to be at peak torque or boost when cruising around at low loads which is the whole point of having 2 overdrives. Some people act like the thing takes more than a fraction of a second to downshift and get into the power/ boost.

I promise you and @grimmjeeper can attest, these new 3.6s do not do SHIT until right after 1900rpm.

I've watched 2.0s on 4.10s and 35s spin both tires on pavement without launching it on the converter. The 3.6 won't.

 

[JT1]

Well if you had it for 8 years, then you must have had it with the JK. 4.88 makes sense for the 3.6. I had 37s with the 4.10 and it was fine. Not great but just fine. I regeared it to a 4.88 and it was fantastic. I had a jk with 37s and 5.13 and I hated it. In my opinion, obviously this is subjective, but I like the 4.56 with the 2.0 and 4.88 with the v6. It feels closest to stock to me. Not scientific of course. Just feel.

2018 was 8 model years ago...

 

[grimmjeeper]

Well if you had it for 8 years, then you must have had it with the JK. 4.88 makes sense for the 3.6. I had 37s with the 4.10 and it was fine. Not great but just fine. I regeared it to a 4.88 and it was fantastic. I had a jk with 37s and 5.13 and I hated it. In my opinion, obviously this is subjective, but I like the 4.56 with the 2.0 and 4.88 with the v6. It feels closest to stock to me. Not scientific of course. Just feel.

You can't compare the automatic to the manual. The torque converter in the automatic covers up most of the low end inadequacies by having a high stall speed. It lets the engine get up to 2,000 RPM before you even really get moving. The manual doesn't.

 

[TyRoosevelt]

2018 was 8 model years ago...

You are wrong. 2018 was the year of the JL. Isnt it 2025?

 

[TyRoosevelt]

You can't compare the automatic to the manual. The torque converter in the automatic covers up most of the low end inadequacies by having a high stall speed. It lets the engine get up to 2,000 RPM before you even really get moving. The manual doesn't.

I wasn’t comparing. Most people have automatics. No one really has manuals anymore. I think 3 percent of jeeps sold each year are manuals. My comments are directed towards the 97 percent.

 

[grimmjeeper]

I promise you and @grimmjeeper can attest, these new 3.6s do not do SHIT until right after 1900rpm.

I've watched 2.0s on 4.10s and 35s spin both tires on pavement without launching it on the converter. The 3.6 won't.

Yep. The difference between the real world and bench racing with out-of-context stats.

 

[grimmjeeper]

2018 was 8 model years ago...

7, actually. The 2026 hasn't launched yet.

Mine was a JK. But even so, the 3.6 didn't have any huge fundamental change. Mostly small incremental changes. It sucked below 2,000 back then just as much as the modern one does today.

 

[JT1]

You are wrong. 2018 was the year of the JL. Isnt it 2025?

JLs were released in late 2017. He could have one that he's owned for 4 months shy of 8 years.

 

[TyRoosevelt]

JLs were released in late 2017. He could have one that he's owned for 4 months shy of 8 years.

No. They were released November of 2017. Its July of 25. He said he drove it for 8 years. I know math is hard but we need to think before we type.

 

[JT1]

No. They were released November of 2017. Its July of 25. He said he drove it for 8 years. I know math is hard but we need to think before we type.

If we want to be pedantic, cool. But what I said IS accurate. There are 8 model years of the JL out there.

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