Should I Regear?

[word302]

I did not see the engine posted anywhere (I may have missed it), but if a 3.6L and a ZF8, this is what I would do:

33" = 4.56
35" = 4.88
37" = 5.13
38+ = 5.38

I have been through the range in my 2019:

33" + 4.10
35" + 4.88
37" + 4.88
37" + 5.13

So I believe I am in a good position to give you some advice--4.88 is going to be the sweet spot and it will be peppy and I think you will enjoy it much more than 4.56 gears.

He’s got the 2.0.

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[Ian4351]

I did not see the engine posted anywhere (I may have missed it), but if a 3.6L and a ZF8, this is what I would do:

33" = 4.56
35" = 4.88
37" = 5.13
38+ = 5.38

I have been through the range in my 2019:

33" + 4.10
35" + 4.88
37" + 4.88
37" + 5.13

So I believe I am in a good position to give you some advice--4.88 is going to be the sweet spot and it will be peppy and I think you will enjoy it much more than 4.56 gears.

Yeah I have the 2.0.

 

[Ian4351]

In that case, for 35's, I would go 4.56. With that said, if you ever think you will go to 37's, then go 4.88 from the start.

I highly doubt I'll go to 37s. Seems like 4.56 is the consensus here.

 

[word302]

I highly doubt I'll go to 37s. Seems like 4.56 is the consensus here.

Famous last words?

 

[Ian4351]

Yep; I said the same thing and two re-gears and two tire size changes here we are:

Nice

 

[ABF4775]

@Ian4351 I am in the same boat JLUS with 35s but the 3.6 and 8sp auto. I’ve been combing this site for weeks looking at advice from all the members. 4.56 seems to be the main consensus and coincidentally what my dealership recommends also. I am likely to do this upgrade soon, just can’t deal with the lack of performance on a daily driver. Then you get into what brand of parts you should use. Seems if you can find Dana/Spicer parts that would be the way to go since its the same as what the factory put in it. At least that’s my thinking on a brand new vehicle.

 

[roaniecowpony]

Yep; I said the same thing and two re-gears and two tire size changes here we are:

CS,
With the 5.13s and 8sp , what speed do you comfortably cruise at?

 

[Ian4351]

@Ian4351 I am in the same boat JLUS with 35s but the 3.6 and 8sp auto. I’ve been combing this site for weeks looking at advice from all the members. 4.56 seems to be the main consensus and coincidentally what my dealership recommends also. I am likely to do this upgrade soon, just can’t deal with the lack of performance on a daily driver. Then you get into what brand of parts you should use. Seems if you can find Dana/Spicer parts that would be the way to go since its the same as what the factory put in it. At least that’s my thinking on a brand new vehicle.

I haven't begun to look at brands yet. Just got my lift and tires done on July 12, so its all new to me but I definitely noticed a change in power and shifting. I definitely want to correct it in the best way possible.

 

[word302]

@Ian4351 I am in the same boat JLUS with 35s but the 3.6 and 8sp auto. I’ve been combing this site for weeks looking at advice from all the members. 4.56 seems to be the main consensus and coincidentally what my dealership recommends also. I am likely to do this upgrade soon, just can’t deal with the lack of performance on a daily driver. Then you get into what brand of parts you should use. Seems if you can find Dana/Spicer parts that would be the way to go since its the same as what the factory put in it. At least that’s my thinking on a brand new vehicle.

DO NOT let your dealership do a gear job for you. Yes, wait as long as it takes to get Dana/Spicer parts. Consider 4.88 if you drive hills on a regular basis, have a heavy wheel/tire combo, or think there’s ever a chance you’ll go to 37s. Also as others have said, if you can find some rubicon takeoff axles you’ll have 4.10 gears, lockers, and a much stronger axle combo. Spending money on the factory sport axles is kind of a waste.

 

[Ian4351]

DO NOT let your dealership do a gear job for you. Yes, wait as long as it takes to get Dana/Spicer parts. Consider 4.88 if you drive hills on a regular basis, have a heavy wheel/tire combo, or think there’s ever a chance you’ll go to 37s. Also as others have said, if you can find some rubicon takeoff axles you’ll have 4.10 gears, lockers, and a much stronger axle combo. Spending money on the factory sport axles is kind of a waste.

I haven't even thought about axles yet.

 

[word302]

I haven't even thought about axles yet.

Honestly if you’re just gonna spend your life on easy trails on those 35s then don’t start thinking about axles, you don’t need them. If you’re like most of us you’ll catch the bug and literally never be finished with modifications. My wife keeps asking me if I’m done. I respond with “I don’t know what that means”.?

 

[Ian4351]

Honestly if you’re just gonna spend your life on easy trails on those 35s then don’t start thinking about axles, you don’t need them. If you’re like most of us you’ll catch the bug and literally never be finished with modifications. My wife keeps asking me if I’m done. I respond with “I don’t know what that means”.?

Haha I had to explain to my wife today why I need to regear and the cost of it. luckily it made sense to her lol

 

[Djhyper66]

Soon as I put new 17 inch rims and 35 inch tires ..I knew I had to regear asap !!! Went 4.88 … only thing I would do different is installed lockers at the same time. Smh ?‍…

 

[Ian4351]

Soon as I put new 17 inch rims and 35 inch tires ..I knew I had to regear asap !!! Went 4.88 … only thing I would do different is installed lockers at the same time. Smh ?‍…

You recommend 4.88 as opposed to 4.56?

 

[Djhyper66]

You recommend 4.88 as opposed to 4.56?

If you think about it..after you changed out tons of heavy jeep parts ….you are better off going 4.88 for the extra power.

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