With a bigger tire, the truck will feel like it is geared higher (numerically lower), which is great for highway cruising, but not for low-end grunt, off-the-line acceleration, or passing power. To bring your rig back to stock performance after a tire size upgrade, it is important to regear the truck accordingly. A simple calculation will tell you what gear ratio would get you back to your stock equivalent. The calculation is your new tire diameter, divided by your old tire diameter, multiplied by your old axle ratio, will equal your new axle ratio:

New tire diameter (in.) x current axle ratio (:1) = new axle ratio (:1)
Old tire diameter (in.)

For towing or performance, you would want the next available gear ratio lower (numerically higher) than the stock equivalent.

So if our truck had 30-inch tires stock, and a 3.73:1 axle ratio, that calculation would tell us we need a 4.103:1 (which rounds off to the readily available 4.10:1) gear ratio to get us back to stock with 33-inch tires. Depending on the axle, the next lowest ratio from a 4.10:1 is most likely the 4.56:1, which should be selected for towing and performance. Because of the extra weight associated with off-road tires, we usually recommend going with a performance-minded gear ratio for any tire size above 35 inches. As a general rule, four-wheel drives need both the front and rear differentials regeared to the same ratio to prevent severe driveline bind.

Alan will need some more vehicle info to make a better call. lol

 

Xcal- Dave
location St. Paul MO.
North of O'Fallon on 79

 

Dave ck out the Missouri FTE members map.... and then come on over to the monthly chat thread. We are all there waiting for you to buy the first round. lol

 

Luke checking in from Nixa, MO.

Looking forward to meeting a few of you at the next G2G in June.

 

Dave and Luke, welcome to the group.

 

Dave and Luke. Welcome to the Missouri Chapter!

Come on over to the monthly B.S./chat thread and hang out a while!

 

Excelsior Springs checking in. Hello everyone

 

Dbeers02, my sis lives in your neck of the woods. Welcome to the site. Nice Bronco.

 

Welcome to the FTE Mo chapter dbeers02, don't forget to cruise by the monthly chat thread.

 

Thanks. Wish I had it back. Sold it and my race car to fight the battle for custody of my son. Finally won that, and ended up buying a 1984 F350 crewcab 4x4 we are working on. Tried to find a decent 70's crewcab 4x4 but just couldnt find what I wanted for a reasonable price. Just getting started on this truck, working with my son to fix her up. Still want a 77-79 crewcab 4x4 with F350 axles some day, but this will be a good father/son project. I will toss some pics up pretty soon.

 

Grain Valley, mo checking in. Just bought my first Ford, 2013 F250 6.2 in July.

 

Welcome and congrats!! Names dalton but I go by jr or country to a lot. Most in here just call me dalton though, however, congrats on the pickup, me personally not a fan of new vehicles too many electronics and computer stuff in them

 

Welcome wg113. Stop by the monthly chat bs forum. And again Welcome!

 

dbeers02 cruise the Craigslist there are some older 4x4 CC's out there. A father/son project sounds like fun, and since you sacrificed so much you deserve some fun.

Wargod113 welcome to the FTE Mo chapter and congrats on the new rig.

Here is the link to our monthly chat and BS thread. Come on by....

https://www.ford-trucks.com/forums/1...elcome-28.html

 

Currently I live in Raytown, just east of KC.

I moved around a lot growing up, I grew up for 12 years in North KC near Liberty and Gladstone.

Then we moved down to Republic, just west of Springfield.

After my parents split up (I was about 14) I lived in Springfield for a couple months, before staying in Overland Park for another couple months, then Blue Springs, and now I live in Raytown.

This state looks the same no matter what part you live in.