I am regearing soon - hopefully next week - and I need some q's answered. Im going with motive gear 4.56s. I am currently running 315s, when these wear out I will get 35x1250 MTs, so nothing bigger than that really... correct me if I am wrong: I need 4.56 Ford 9.75 for the rear, 4.56 reverse cut Ford 8.8 for the front, and what's this I heard about an install kit?! That sounds like a do it yourself thing, but Im not doing this myself, I will take it to a shop. Im thinking about 600 to install it all... I have 3.73s right now and get anywhere from 12.5 - 14 (at the best) mpgs... is it even worth it to regear? or should I put my money elsewhere?...

also I have a bodylift. Those of you who have it know how it messes up the angle of the air intake - especially aftermarket ones, like my airaid. Im looking into a tbs to fix the angle (my airaid has a hard plastic head to it and no rubber adjustable piece like the OEM one). I don't expect to get hardly anything performance wise from the tbs, does it really matter which brand I get?

 

Well in the summer ill be doing the same gear setup as you, and you are correct about your gear selection.

as far as the spacer, I would get one that doesn't make that annoying whistle sound!

 

okay... sweet. so I don't need the "install kit"?

 

the shop will either have you buy an install kit or charge you for it but either way it is necessary.

 

I just buy the install kit when I order the gears. We just put 4:88's in my truck over the last 2 days. You definetly want to change the seals and bearings.

 

ok... cool. Thanks guys! The install kit comes with gears apparently.... so I guess that price isn't too bad. I got the AFE throttle body in two days ago. Installed it that night. After I got the throttle body off I realized it didn't have the gasket... I found it the yesterday in the box, under a cardboad sheet.... I ran it yesterday w/o the gasket... it whistled a lot. Annoyed the crap out of me... I reinstalled it last night. Put the gasket in, and it sounds much better... Im gonna be getting my gears here shortly, if all is well...

 

I just had the 4.56's installed after my lift and tires its definitely worth it