it seems to make sence too me that the gearing of the tranny is part of why we get bad gas milage for a 6 cyl so what i have noticed is my serria rins at 1500 rpm at 110 km i guess about 70 mph my ram 3500 diseil is about 1900 rpm same speed towing 13k so whay dose the ranger run 2300-2500 rpm? would it be possible to get some sort of extra gas milage by altering the gearing or if its possible adding a sixth gear like every other vehicle in the world has? and for the sixth gear is is possible too add or just by new tranny? it just seems too make sence too me thay we are loosing good miles at cost of our rpm

 

You cannot add an extra gear to a transmission. You can however change the ring and pinion to get a lower final drive ratio, which would lower rpms in overdrive and increase mpg's. Next time you post, please use punctuation and a spell check. I'm not trying to be mean, it would just help to understand the post better.

 

You can try and extra overdrive unit. Your looking at 3k us for that though.


The reason they get bad mileage is they have bad flowing parts on them.


I dont know anything about your truck nor what mileage you get with it. Its hard to say if your having an issue.

 

If you want to lower the RPMs for a certain speed, just slap on some bigger tires. The tach and speedometer won't appear to change, but you will be going further for each revolution of the engine.

 

What year truck, what eng, what tranny? Might get more insight .. I have an 03 edge 4.0 with the 3.55 rear and a 5 speed auto tranny avg. 20 mpg I drive 100 miles a day usually running 70 mph.