Originally Posted by Grabber Blue5.0
This is 100% spot on. Too many guys get hung up on that number and assume Ford did it for gas mileage when it reality unlike previous years this automatic transmission has very steep gears. If you do the math out for the gearing in the transmission and the 3.15's you end up with a final ratio around 3.55-3.60.
Youve definitely done your homework, your earlier post got the ball rolling for me to verify the ratios. Good stuff.
Did an experiment today....changed my torque tune to a Bama race tune that was supposed to enhance further the intake mods and give a nice jump across the band. My low end suffered greatly...could not chirp the tires and I lost a good .5 off 0-60. Now if I thought this was my best tune option, I'd be buying steeper gears to make up for the loss on the low end..thinking all the while 3.15 is just too weak.
......for others on the fence
Moral of the story is, the right tune...especially one that enhances your cars true low end power with those stock 3.15s is really where you should focus your energies on. Bama makes a hybrid tune, its other tunes IMO dont compare for a performance guy.
Honestly...I still fight the need to buy steeper gears, but paying near a grand for parts and installation (dealer prices) with the inevitable worse MPG/higher revs and possibly not getting a performance jump. ...
would kick my own ***!