hey guys, i got a quick question for ya, what is different between the 97-2003 off road 4x4 and the FX4's? i have a 2002 fx4 and my buddy has a 99 off road, and i do wayyy better off road than he does, even in 2wd. so im guessing fx4's have limited slip, different gears(if so, what are the fx4 rear end gears?), and what else?

thanks
Adam M

 

i have an 2003 fx4 and it does have limited slip also im not shure but i think stock gearing on fx4 is 373's

 

I had a 02 fx4 it had a open diff and 355

 

my '02 fx4 has 3.55 open diff also, check the code in your drivers door, if it's 19 you have the same as us

 

my 03 has a LS 3.55

 

you could get under the truck and look at the tag on the diff if it says 3L73 then its 373 limited slip if its just 373 then its an open diff

 

ill check her out tomorrow, but i did do a burnout and both tires were goin at the same speed, so im hopin i got a LS. it seems to whip around on snow a lot more(and a lot easier) than my buddys open diff 99.

 

in the door under rear axle or something like that it says H9, idk if i was reading it right, but whats H9, i didnt see a 19 anywhere in the number things, or what part in the door should i be looking?

 

This should help you some. And from the looks of things if your axle code is H9, then you have 3.55 gars with a limited slip. Hope this helps


Axle Type

19 — 3.55 non-limited slip — F-150
25 — 4.10 non-limited slip — F-150
26 — 3.73 non-limited slip — F-150/Mark LT
27 — 3.31 non-limited slip — F-150
B5 — 4.10 limited slip — F-150
B6 — 3.73 limited slip — F-150/Mark LT
H9 — 3.55 limited slip — F-150

 

yup, i looked again, it says H9. so good, i have a limited slip! not too worried bout the gear ratio, i dont do too much off roadin unless its hunting season. a 3.55 will do fine for me! thanks a bunch!