Posted by McDonoughDawg on January 14, 03 at 18:57:54:
In Reply to: 4.10 rear to 3.73 or 3.42? would it greatly improve gas mileage with 8.1l? posted by Joe on January 14, 03 at 17:19:09:
I have heard of folks going up from 3.42 to 3.73's or higher and it actually helping mileage. Not to mention, who would want to buy a 2500 8.1 Sub with a 3.42 gear.
I hate to ask the obvious, but what did you expect?