so my guy that threw on my 3.5" lift with 35's said not to go higher than 4:56 gears with the new motor and trans... anyone know why that might be? i would like to atleast push 4:88's... but if he has a good reason to then i dont want to not listen to him. thanks

 

between the new 3.6L and tranny, i might recommend running the factory 3.73 if that's what you have now. if you have the 3.21's, i too would recommend nothing higher than 4.56. 4.88 will get your rpm's running over 3,000 at highway speeds.

 

thats the answer i was looking for!! thank you very much! i have the stock 3:21 and they are garbage....

 

I have had my 2012 unlimited 6sp geared with 4.56's for about 6 months.. Absolutely think its the best combination. I'm running on 35's as well and it has more take off then the 3.21 with stock tires. I have no problem going up hill on the highway in 6th gear. Before with the 3.21's, I had to down shift with the stock 32's.. I thought I needed 4.88's from reading all the forums based on the 3.8l jk's but was talked out of by the guy who did my gearing.. Hope this helps!

 

thank you! it sure does!