A question of the Ford Gurus

Hoverbug · 08-03-2005, 07:02 PM

Oh great ones, the gurus of Ford! How does one know the diffential gear ratio. I was led to believe my truck is a 4.10 but how do I check to be sure??

Hoverbug · 08-03-2005, 07:02 PM

Oh great ones, the gurus of Ford! How does one know the diffential gear ratio. I was led to believe my truck is a 4.10 but how do I check to be sure??

Grizwald2 · 08-03-2005, 07:15 PM

In the chevy its on the sticker in the glove box with the code for all options on the truck. chevy is G80 for the locking diff and i forget the code for what ratio it is. find the options codes for ford and i bet it is in your glove box also HB.

Don

lincster · 08-03-2005, 07:20 PM

You can get the axle code from the door jamb sticker and call the dealer.
Or you can jack the rear end up and count how many times the driveline turns for 1 revolution of the tire.

C.CARNEY · 08-03-2005, 07:25 PM

Dave,

Some of the axel housings have it stamped on the housing or on a tag attached to one of the differential bolts. Otherwise, I'm not sure how to read it on the info tag. It is coded with a number of some type. Maybe call the dealer and they can tell you where to check.

One other way to check it manually is to jack up the back of the truck and turn the wheels. One rotation of the wheel to however many rotations of the driveshaft will give you the ratio.

You just need a good jack to get the truck off the ground though.

Clark

WWFan · 08-03-2005, 07:27 PM

Boy...hate to swing you guys away from here, but that's an easy one for the guys over @ TDS...they could tell you what every single number means in your VIN... (Lincster...you know!).

Of course, if anything changed by a prior owner, that's another story. But they'll know that too. If it walks like a Ford, and talks like a Ford, those guys know.

Sean

Hoverbug · 08-04-2005, 11:58 AM

Puzzle solved! Found a knowledgeable parts guy at the Ford store. Had checked with two dealerships before and curiously no one in service had a clue. Ford does not put a sticker in the glove box with the different codes as does GM. There is a tag on the diff. case. Turnsout mine is a 3.55 not 4.10. Good news/bad news I quess. Better gas milage less power. With the best price per gallon for 87oc in KFalls today at $2.51.9 perhaps I should be happy with the 3.55. Thanks for the input guys