jk_sea

Check out the chart, though. A stock Rubi with 4.10's is turning just over 2500rpm at 70mph. A 4.56-geared 3.6 at the same speed is only turning slightly higher RPM's. The 3.6 has good power, but it's not making a whole lot in that 2000-2200 range which is where 3.73's would put it.

Kevin123

If you go by the chart 4:10 is the perfect gear, because the range is so wide. You can run 32 to 35 and stay in the green. Like I said the only time I see were I need more gear with the 3.6 in on the highway and trails. since the speed limit is 75 here in Texas 6th gear is useless.

Rticul8

I'm from Texas.

Have a 2015 JK Sport with 6 speed and 3.73's with 33's

I think its perfect at 70 I am about 2200-2350 rpms. Unless I need to pass very quickly I can leave it in 6th and just accelerate without a single issue. First gear use is about 0-15mph or so on regular driving. I have never needed to down shift to pass someone. For a daily driver I love 3.73's in 4low it also crawls pretty good.

cormac827

I wouldn't recommend installing used gears in a different axle housing

Kevin123

That's sorta what I was thinking!

kmrtnsn

I just put 33"s on my 2013 JKUS with 3.73s. I am going to have to say that for 33" the 4.10s would be ideal.

Kevin123

Yea I'm starting to rethink this!

kmrtnsn

Don't get me wrong. 3.73's and 33''s are fine but I can see where I'd be able to put more power to the ground in certain situations with 4.10's. I'm just glad I insisted in 3.73's when I bought our Jeep.