Originally Posted by screwystewy
Trail gearing its fine its more the around town gearing. I stay off the highway anymore so thats not a factor. Its the hills around here going up a hill its peg to the floor and struggling to keep 30mph at times it actually starts dropping mph lol
Sounds like you may have some other problems. How did it run before the rebuild? Is the exhaust stock (ie, is the cat still in place)? Brake calipers stuck? Your Jeep looks heavily modded, have you added a lot of weight?
I ran some rough numbers. Most of the 2.5s had 225/75-15s and 3.73 gears with the 3 speed auto although I've driven a few and felt like they should have had 4.10s from the factory. The 225/75 is theoretically a 28" tire so the 4.56 gears with 33s should have put you to slightly better than stock but wouldn't allow for extra drag or weight gain. You can go up to 4.88 in the D30 HP, would be about a 7% increase over the 4.56s but probably not worth the cost to regear unless you do it yourself. Since you aren't doing any high speed driving, even 5.38s might work, would put you at about 3065 rpm in drive at 55 but like you said, you would have to go to a D44 in the front. 60 to 65 mph would probably wide open for highway cruising (about 3500 to 3600 for extended periods).
If everything is good with the motor, I would start looking at ways to make it lose weight or start considering some sort of engine swap.