x2 on that, my truck was undrivable. I couldn't go past 55 without my transmission at 200 and above! It was mis shifting and throwing in/out of gear

 

I have the 4.0 OHV/manual tranny and 4.56/35s. At 55/60 it runs approximately 2k RPM or a hair over. If you currently have 4.10s try them, if you have 3.73 I would go ahead and get some 4.56s. I am pretty happy with this setup, but I don't drive over this speed very often.

Only reason I would get 4.88s is if its a trail truck or you see bigger tires in the near future. Oh, and I believe there is quite a difference between the 3.0/4.0 comparison.

 

I have the OHV w/ 4.10s..so I mean from what ya'll are saying i imagine the 4.10s will be alright but I think after awhile Im gonna have to go w/ 4.56s..it sounds like the best all around way to go.
I really appreciate the help!! Im excited as heck to get the 35s on :)