Hi guys,

I'm looking at 2002/2003 f250's with the 7.3. I've seen some F250's with PRN(D)321 and others with PRN(D)21. What's the deal with these? Did ford put a 5 speed in some of the f250 autos? If so should I look for a 5speed?

Thanks

 

Top of the tranny page has your info, but this snippit should help.

Model: 4R100
Type: Four speed + reverse and 100(x10)lbs of torque
Years: 99-03 F150/superduty
..........03-04 gas superduty
Engines: 5.4L, 6.8L, 7.3L
Display: PRN(D)21 w/ overdrive lockout switch
Fluid: Mercon
Ratios:
1st 2.71:1
2nd 1.54:1
3rd 1.00:1
4th 0.71:1
Trans code: E (gas), 9 (diesel)

Model: 5R110 “Torqushift”
Type: Five speed + reverse and 110(x10)lbs of torque
Years: 03-06 6.0L,
..........05-06 5.4L, 6.8L Superdutys
Display: PRN(D)321 w/ tow haul lockout switch
Fluid: Mercon SP
Ratios:
1st 3.09:1
2nd
3rd
4th 1.00:1
5th 0.71:1
Trans code: B

Adrianspeeder

 

The 7.3 didn't come with a 5 spd auto, but the 6.0 does.

 

Thanks guys,

I knew ya'll would be able to straighten me out.

Pops