OK, so i just bought a 1999 Quad Cab long bed GMC with a cummings 12v and a NV4500 tranny. It has a six inch lift and 37 Procomps on it. I drove it back from ohio and i got about 16.5mpg.

I'm relatively certain it has a 4.10 gear ratio in its D60 single rear wheel rear end.

I want to maximize fuel economy. Here is what I'm thinking:

Remove 6 inch lift.

Remove huge ******* tires

Install Dana 70-6HD (i know its a dually) rear end w/ 3.07 gear ratio.

Change to 235/85/16 tires.

My question is this can i change the front gear ratio that low.

Also, will it be geared to high for signifigant towing?

Thanks for you thoughts

Vido

 

Cummings

 

indeed, its what it makes all the girls do.

 

No actually it's CUMMINS