zx12-iowa

In a 5.0 need a 3.55 or 3.73 since it has a weaker low rpm torque band. In the eb, you can swing a 3.31 to get great mpg too or stick in the middle at the 3.55. I towed an 8k lb boat with Eco and 3.55 easily. 5.0 would have towed it but nowhere near as easy. 3.31 gear tows it likely as well as a 5.0 with 3.73. So depends on your engine choice and what your goal is....

DBL Boost

3.31=better fuel economy 3.31 = how many times the rear end rotates to 1 revolution to the driveshaft.

Z7What

Your backwards, 3.31 turns of the DS equals one turn of the axle. I vote 3.73s!

Wayne

Bosro

Ill bite...
Depends on engine and towing requirements.
70K miles on my 3.73 geared EB towing a 6k trailer lots...I could get away with 3.55s easy.


Been running a rental 5L for a couple of weeks with 3.55s and the lack of low end is very noticeable to me.
If I'm getting the 5L its 3.73s.....
Everybody is different but running the EB for 3 years has spoiled me with the low end.

rancheroracer

My 2 cents: my '11 had 3.73, this '12 has 3.55s. As far as 1/4 mile times go, my '12 did the same ETs stock as the '11. I plan to get 3.31s in the '15.

DBL Boost

That's what I ment, I have to stop posting at 2:30am lol

Bosro

Towed my 2000lb fishing boat today with the 5.0L loaner.
It tows ok but the lack of low end from the engine and 3.55 gears is so noticeable compared to the EB.
Hills that the EB wouldn't even downshift to 5th the loaner was hitting 4th.
I really don't think I'd enjoy the 3.55 gears and 5.0L combo pulling the travel trailer.
I'm missing my truck now......
If I was getting a 5.0L and towed anything the 3.73s would be a must.