My 2 door JK has 33x11.5 tires and a 2.5" budget boost. Right now I have a d30 front and d44 rear and holding 3.73 gear ratio.

How will my torque, MPG and overall street/highway driving be affected if I swapped to 4.56 gearing or to 4.88 gearing?

Thanks. Oh, and I also offroad about twice a month or so, if that helps with anything.

 

I'll help you answer this. What did you think of the Jeep with the stock tires and the 3.73's? I had the 31's (245/75/16) and 4.10's stock and the thing flat out flew with a 6-speed. With my 35's I am planing on 4.88's when the time comes (I want other stuff first). If you liked the way it drove stock I'd say the 4.56's are the better option. If you thought it needed more gear then go with the 4.88's. You might even be really happy with a used set of 4.10's if you don't have the 4-speed auto. Nobody can tell you what the right gears are without a good understanding of your expectations.

Ty

 

Thanks, I'm glad someone got back to me. You answered my question pretty much. I think I am going to go with the 4.56 gears...see I'm getting front and rear ox lockers too, and they require 4.10 or higher, so I also want that extra power. Anyway, thanks for the help.

 

Is anyone even shipping 4.56 gears yet? Also, there isn't an OX available for our JKs yet due to the JKs all using the "thigk" ring gears. Even if you are going lower than 4.10 you have to use the carrier for the higher (3.73 and numerically lower) gearsets. OX doesn't make one of those for a Dana 44.

 

Superior Alloy has 4.56 gears available. As for the Ox lockers, they're available if you go on Ox's main website - trust me, they're ready! Only thing is they require higher gearing for some reason.

 

You aren't understanding what I was saying. Our JK's REQUIRE that a differential case be used that is normally for the higher (numerically lower) gersets, even if you are using low (numerically higher) gears. OX ONLY make cases for low (numerically high) gears. From everything I have found out, it won't work. The ring gear flange offset will be wrong. Do a search on the forum and you will find the same info from numerous sources.