3.0 vs 3.8

skipnrocks · Nov 23, 2019

Looking at a new atlas with a new transmission. I going to run a 6l80e which has a 4:1 first gear. I'm just curious to give a balance of crawling vs wheel speed what do you guys like? I'm leaning towards 3.0.

muddinmetal · Nov 23, 2019

Axle gears?

redneckengineered · Nov 24, 2019

skipnrocks said:
Looking at a new atlas with a new transmission. I going to run a 6l80e which has a 4:1 first gear. I'm just curious to give a balance of crawling vs wheel speed what do you guys like? I'm leaning towards 3.0.

You need a 5.0

skipnrocks · Nov 24, 2019

redneckengineered said:
You need a 5.0

Haha. 5.13 gears

muddinmetal · Nov 24, 2019

3.8 would be my choice. But you will be just fine with the 3.0

skipnrocks · Nov 25, 2019

muddinmetal said:
3.8 would be my choice. But you will be just fine with the 3.0

You like the 3.8 for a little lower gearing?

muddinmetal · Nov 25, 2019

I do, especially since you have more transmission gear options than the average wheeler. You would be able to easily start most hills in 2nd where most other people couldn't

bigs10blazer · Nov 26, 2019

my son has a 3.0 hero in his behind the 6 spd tranny, it crawls really well , usually in first and second , I would recommend the Manuel shift valve body , or else it will be shifting by itself when your not ready

pipewrench · Nov 26, 2019

I have a 3.8 atlas with 5.39 gears. I dont have the wheel speed I would like. If I did it again I would do the 3.0. I'm going to regear to 4.56 to help some.

muddinmetal · Nov 26, 2019

pipewrench said:
I have a 3.8 atlas with 5.39 gears. I dont have the wheel speed I would like. If I did it again I would do the 3.0. I'm going to regear to 4.56 to help some.

What engine and trans?

Beerj · Nov 26, 2019

I have 3.8 with 4.10 gears. Seems pretty good to me

muddinmetal · Nov 26, 2019

Off topic, but I have a 4.0 Jeep with a 2.8 1st, 4.0 low, and a 4.10 gear. It crawls no than when it was 2.8 ,2.72 , & 4.10 it is lower now, but still not a crawler gear

pipewrench · Nov 27, 2019

muddinmetal said:
What engine and trans?

5.3 and 350 trans.

wizzo · Dec 2, 2019

pipewrench said:
I have a 3.8 atlas with 5.39 gears. I dont have the wheel speed I would like. If I did it again I would do the 3.0. I'm going to regear to 4.56 to help some.

Jody, I have a stock L33 5.3L, th350, 3.0 atlas and 5.13 gear ratio. I like the combo. IMO if you're gonna go 4.56 with that combo, you may need to warm up the engine a little bit. But maybe you already have?