Why does Ford install 3.55 rears as standard when GM and Dodge both use 3.73 gears???? The 3.73 get better mileage and performance. Is there an engine wear issue??

--karl

 

My guess is that Ford feels that 3.55s are the best compromise between performance and fuel economy. I think Chevy has to use lower gears because of their engines. If you look at the dyno numbers the Chevys are more of a high revving engine, similar to a sports car. The Fords are more like a traditional truck engine. They make their power and torque at a much lower rpm than the Chevys. I think that is why they can get away with higher gearing. It's all about compromise. I'm like you and most enthusists however I would rather have lower gears and more performance, even if it cost me a couple of mpg. You know, I bet the Chevy guys are wondering why they can't have 4.10s

 

One Word (well 4 actually) CAFE!

Ian