I Have 04 F150 4x4 Im Runnig 315 75r 16. This Is My Deal When I Floor It To Pass Someone Or Pull Out In Traffic Sometimes It Will Down Shift And Hit Passing Gear Other Times It Will Fall Flat On Its Face. My Buddy Also Went To Lager Tires And Has The Same Problems. My Question Is What Is Best For It Gears, Programer, Shift Kit. Or Anything Else U Could Think Of. I Just Dont Want To Burn Up The Trans By It Jumping Up And Down.

 

What type of gears u got right now?

 

Im Not Sure Its An 04 Heritage Edition 4.6 Auto 4x4 I Know This Propbily Dosent Tell U Much But If U Will Tell Me How To Find Out I Will Look It Up. But They Are Stock All Know. Thanks For The Info

 

3.55 Gear Ratio

 

I would say gears and or programmer. ALot of the members here go with an Edge or a custom tune by Troyer. If it were my truck i would go with gears first then a programmer. If you plan on more mods later like CAI and cat-back exhaust, think about a custom tune. Gears i would say 3.73 or 4.10 in your truck.

 

Thank U For Ur Help I Will Look Into Some Gears And See What I Can Find.

 

Let us know what u decide and how it works out.