Can I fit 37's ?

[MUSKYMAN52]

cant wait to hit the mud runnin 31" cooper discoverer a/t3 always kept traction in the snow

 

[Thermo]

reef, when i was trudging through 3 feet of water (comes up to about my bumper), I kept the truck in 2wd. Most of my time out "4x4ing" now is keeping the truck in 2wd just to make it fun and challenging.

 

[reefkrazy]

reef, when i was trudging through 3 feet of water (comes up to about my bumper), I kept the truck in 2wd. Most of my time out "4x4ing" now is keeping the truck in 2wd just to make it fun and challenging.

Sick! I'm drooling over your truck I think one day I will jack it up that big. For now it's my daily driver ( at 10mpg lol)

 

[MUSKYMAN52]

im high school, daily driver 12 haha

 

[reefkrazy]

im high school, daily driver 12 haha

Im sure my hypertech programming and the k&N CAI + heavy foot doesn't help but I love the look on peoples faces when I crank by them off the line lol.

 

[MUSKYMAN52]

me 2 i need a loud horn now like a semi horn haha

 

[reefkrazy]

I just got my 37's. mounting them soon. Got toyo open country. these things are freaking huge!! pics soon

 

[Lane24]

Can't wait to see them mounted up !!

 

[reefkrazy]

Ok, So can I get away with putting them on my truck to make sure they fit good b4 I change my gears? I work 10 sec down the street. So It wouldn't be pushed. Could it be driven lightly b4 the gear swap? Thanks

 

[FordandPolaris]

Ok, So can I get away with putting them on my truck to make sure they fit good b4 I change my gears? I work 10 sec down the street. So It wouldn't be pushed. Could it be driven lightly b4 the gear swap? Thanks

I would say that would be fine. Just don't be surprised when it drives like a slug. Not really going to hurt anything though.

 

[reefkrazy]

Please excused my ignorance....lol but is this all I need? Front and back ? Also, I cannot find a reversed rotation for front. Is this needed?

Ford 9.75" Yukon Ring and Pinion Gears | 4.56 (2010 and Older)

 

[reefkrazy]

would the 4.56 gears hurt the expedition running the 35's ?

 

[Canadian Expy]

Nope I run 4.56 gears in mine right now, with 35" tires

 

[Canadian Expy]

Depending on what you plan on doing you might want to go with 4.88.


I put in 4.56 front and rear plus master overhaul kit all from Randy's ring and Pinion. Great kit !!

 

[reefkrazy]

Depending on what you plan on doing you might want to go with 4.88.


I put in 4.56 front and rear plus master overhaul kit all from Randy's ring and Pinion. Great kit !!

I have toyo open country mt 37 x 13.5 R20 Im running 35 mt now.

 

[Canadian Expy]

Do you plan on towing?
do you want more off the line power or highway?

 

[reefkrazy]

Do you plan on towing?
do you want more off the line power or highway?

As of right now no towing. I sold my boat probably off the line power. With the lifted expy I don't go to much above 65 mph. Maybe 70.

 

[Canadian Expy]

4.88 would be more fun then.
I went 4.56 but I tow and do highway driving

 

[reefkrazy]

will the 4.88 scream on highway? I do travel to Georgia once a year long trip lol

 

[FordandPolaris]

Courtesy of toms89, a little math formula.

(current RPM's at a given speed)/3.73=x

x*4.88 will give you an estimate of your new engine RPM's given no change with the tires. I would say if you want any kind of freeway drive-ability, I would go with 4.56's personally. But I have never changed gears in a vehicle, I am going off of what I have learned from others.