Battle of the heavy weights

06Fargo wrote:
Anyone know why the 3 trucks had different rear ratio's? If GM 3.73 is their lowest ratio why not test all 3 at ratio's close to 3.73?

I noticed the truck with the lowest rear ratio climbed the fastest...

If the transmission gear ratios and tire sizes are considered did they then have the same final drive overall gear reduction?

Do they all have the same governed engine rpm?

Do they all have the same power output?

What was the fuel rate?

Do they have headlights you can level without tools?

I-6 and V-8 have very different RPM ranges, torque ranges and HP peaks at different RPM's. Axles ratio are determined by transmission gear ratio's. The Duramax/Allison has almost always been sold with 3.73 gears. Dodge/Cummins has been sold with many gear ratio's and 6 or more different auto trannies, and several manuals. Ford's always seem to have low ratio's and lots of RPM's. Double overdrive 6 speed auto's seem to be the norm now(two overdrive gears - 5th and 6th).

If a manufacturer is going to provide a truck for a tow competition, they most like will provide it with their best towing ratio!!!!!