Stuck a leveling kit on my truck and in the near future Ill be getting some new tires looking at 33s. The question I have is will I have to regear with 33s or is the stock gearing fine. I have a 2004 f150 lariat 4x4 if that makes a difference.

 

Ive got 33" Toyo MT's on mine with the stock 3:73's and I havnt had any probs

 

I have the exact same truck and just put 33s on it. No prob so far. 35s is where u run into probs.

 

Ok I didn't really think I would have to regear. But thanks for the replys

 

I'm running 33s with a 2.5 inch leveling kit for over a year and no problems what so ever

 

I have rhe AS 2.5 kit with 35's and had to trim inch from the valance but other than that, no issues at all. It actually shidts smother as well.

 

33's wont be a problem at all. I have 35's on a 2.5 HBS level and still have the stock 3.73 gears. They are fine but the only definite change is needed when you go to 37's.

 

What kind of problems do the 35's cause?

 

You just need to trim a little of the valence and in some cases the inner wheel fender so they dont rub. They are obviously a little rougher on the tranny but it can handle it. As long as you arent towing massive amounts often or drag racing it everyday.

 

so a 3.73 axle with 33s should actually get slightly better mpg, right?