[Chaselady]

Originally Posted by Blue Thunder

Apologies, Red Apple, but you've got that exactly backwards. The lower the rear end ratio, the better your fuel mileage will be and towing "performance" will be less.
Chaselady, if you are purchasing a truck, say a GM, the rear end ratio options would be 3.42, 3.73, and 4.10 (other manufacturers would be similar). A higher or sometimes called "taller" gear ratio will give better towing performance and lesser fuel economy. If you are looking to tow a four sled enclosed trailer, I wouldn't go with any ratio less than the 3.73. My personal vehicle is a 10,000 lb GVW 3/4 ton pickup with the 4.10 rear axle ratio. I can tow anything anywhere...except past a gas station!!

BT

This is helpful. Thanks