Tire size/Gear ratio
 

Hi everyone,

I have been looking to buy a 2001-2003 F150 Supercrew.
I came across one where the owner listed tire size and gear ratio.
Most people don't include it.

He listed P225-70 R 17 and 3.73 gears.

I don't know the significance of this information.

Is this a good combination?

I will tow a 23' boat twice a year 20mi trip.
I will also tow a medium size trailor once a week 10 mi trip
The rest will be driving to work and running errans.

Thanks
Dexter

Stock is 265/70/17 so wtf with 225? This causes a 7% error in speedo reading. 3.73 comes with the 7700 gvw package for towing. The new tire size gives the truck an effective 3.99 ratio.

Kaboom10

OOPS.

The tire size is P255-70R17.

I guess my question is, What difference would the 3.73 gear provide as compaired to the stock 3.53

Thanks

The 3.73 ratio gives you a higher pay load you can pull. I think it gives you another 1000 pounds or so. It's just a little easier to start moving. I switched from 3.55 to 4.56 w/stock tires. I just wanted some more performance with what I could tune out of the stock motor. As far as pulling what you want to you should have no problems unless the trans isn't up to snuff. I would have all the old fluid taken out and replaced along with a new filter.