JLU sport S on 35s regear to 4.56 or 4.88?

[JudHumphries]

I have a 19 JLU Sport S with Manual 6 speed lifted 2" and on 35s. I believe the stock gears are 3.73. I use it as a daily driver and I have to tow a boat sometimes. The shop recommends 4.56, but I have read a lot of people saying to go with the 4.88. I would still like to be able to go down the highway in 6ft without my RPMs being too high. Any ideas?

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[Strommen95]

Stock gears are 3.45.

I would go with the 4.56 personally. I'm going to in 3 years when the warranty is done. I remember in the JK days 35s were traditionally paired with 4.56 and 37s with 4.88. With the improved transmission with the JL I can't see how it wouldn't be the same. Performance will be a little better too compartively.

 

[Jlmoe]

4.88 will give you more power in 6th gear

Also, better if you ever plan to go with 37's

 

[Jeepjunkie]

My JL is getting 4.56s installed as I type. I have 33s now but will go to 35s this winter. I’ll let you know how it goes with both sizes. FWIW I drive 250 miles round trip once a week, so in addition to off road performance (I do that too) I’ll be interested in highway manners.

 

[MyJlU]

My first JK i did 4.88’s and regretted it till the day it was sold. Mid you it was only on 35’s and if I could do it again I would have done 4.10’s or 4.56’s. Also it was a 2010 and had the 3.8 sled motor, off road 1st gear was almost useless.

 

[JudHumphries]

Has anyone tried the 4.88 on the manual trans? If you have, how does first feel?

 

[anotherWS6]

Dont waste time with 456's. I'd do 4.88s or 5.13's. I have regeared before.

 

[Scooter2]

I have the same set up, sport/manual/2" lift/35's. Im running 4.56 gears, and am perfectly happy with it.

I would hardly call the 4.56 a waste of time, but to each their own.

That being said, I think most of these hardcore cats like @chevymitchell are running 4.88's or 5.13's

 

[JudHumphries]

I have the same set up, sport/manual/2" lift/35's. Im running 4.56 gears, and am perfectly happy with it.

I would hardly call the 4.56 a waste of time, but to each their own.

That being said, I think most of these hardcore cats like @chevymitchell are running 4.88's or 5.13's

Thanks. Have you tried any towing with that set up? If so, how'd it do?

 

[gsxr310]

4.88's give you the room to add 37's in the future. Otherwise, 4.56 if you will be set on 35's

 

[Scooter2]

Thanks. Have you tried any towing with that set up? If so, how'd it do?

No towing for me

 

[JudHumphries]

Thanks everyone for your opinions. I was at RIVER RUN (a mud park) and I had the opportunity to ride and drive a manual JL geared in 4.56 and 4.88. The 4.88 was a little tall for my taste. On town roads you can almost throw away 1st gear. The 4.56 was a little batter than stock on my 35s. There was a 4.56 JK there that was running on 37s. The owner told me he still has power in manual 6th.

 

[JudHumphries]

Here she is with 4.56 on 35s playing in the mud.

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