i have a 2004 ford F150 XLT 4x4 with the 4.6. I had the stock 255/70R17 tires on it but decided to go with a larger tire Lt295/75/R17 (Nitto Terra Grapplers) with the help of a 2.5in leveling kit.It is all stock except for true dual exahust, cold air intake, and hypertech max energy. With the new tires on it feels sluggish taking off and pulling a trailer. Should i change the gear ratio. What ratio should i use and what axles do i have front and rear. THANKS

 

Don't waste your money..

 

thx

 

No problem.

 

Being that it is the 4.6 and having the 4r70 trans, i would regear to a 4.10 ratio. i know guys who ripped out their trannies in less than 30k miles with only 33's.

 

I'm not sure it'd be worth 1500 bucks.

 

you can do it for around 800-1000 bucks if you drop the front diff yourself.

you can get gears for under 600, plus labor, alignment, fluid, etc. i got a quote of 300 bucks labor to take my truck into the dealer, they will do the rear and i will bring in the front diff

 

Let's be honest.. I don't know or claim to know the mechanical knowledge of the OP, but most people are not willing to drop their own front diff.

 

Your change will have your speedo reading about 10% slow....60mph shown will be 66.5mph true.

If you take that into consideration, I don't see why you would want to spend the bucks and the time to "re-gear" your differentials. Just use the lower gears more often.

 

I am just throwing it out there, i have no idea how mechanically inclined the OP is either, i am just saying that it can be done for alot cheaper than most think, if they are willing to get there hands dirty