hey do underdrive pulleys even matter on a 6?

 

Needless to say, all they do is make your dyno look a little better, not much in the actual performance department. Save a little more money and invest in gears and a limited slip differential (much better performance gain there).

 

i dont know a whole lot about gearing what gears are good?

 

what if your running an 03 automatic...

 

Everything makes a difference. The thing that you have to ask yourself though is whether you can justify the amount of money you are going to be spending on that one mod. lol

 

Auto - 4.10's
Stick- 3.73's

 

they make gears for automatics...
i always felt left out...
were can i find some gears for an 03 automatic?

 

what kind of gas milelage do you get on the highway with the 3.73's

 

i have a 1991 5.0 that is a auto and i 3.73 gears on it, i could feel a difference on it and i have underdrive pullys, i think it was worth the money but make sure the person who install your gears you trust and they know what they are doing. But for a 6 i dont know

 

Why would they only make gears for manuals? Did you think that automatics did not have gears?