My 1999 F350 7.3 Diesel, 2WD 6 speed has the following VIN
1FTSF30F1XED21331

I check the Ford translation site looking to find out the info on the rear end.
I'd like to know the ration and if it is limited slip or not.
Thank you.
Eric

 

Look in the drivers door jamb at the VCL. Its a white label near the door striker. Under 'axle' whats the code listed?

 

The axle code is;
D-1

Eric

 

I believe it is a limited slip differential with a 3.73 ratio.

 

Here's the complete axle coding in case anyone else should search..

31 — 3.73 non-limited slip, F-250, single rear wheels
32 — 4.10 non-limited slip, F-250, single rear wheels
33 — 4.30 non-limited slip, F-250, single rear wheels
36 — 4.56 non-limited slip, F-250, single rear wheels
C1 — 3.73 limited slip, F-250, single rear wheels
C2 — 4.10 limited slip, F-250, single rear wheels
C3 — 4.30 limited slip, F-250, single rear wheels
C6 — 4.56 limited slip, F-250, single rear wheels
41 — 3.73 non-limited slip, F-350, single rear wheels
42 — 4.10 non-limited slip, F-350, single rear wheels
43 — 4.30 non-limited slip, F-350, single rear wheels
46 — 4.56 non-limited slip, F-350, single rear wheels
D1 — 3.73 limited slip, F-350, single rear wheels
D2 — 4.10 limited slip, F-350, single rear wheels
D3 — 4.30 limited slip, F-350, single rear wheels
D6 — 4.56 limited slip, F-350, single rear wheels
61 — 3.73 non-limited slip, F-350, dual rear wheels
62 — 4.10 non-limited slip, F-350, dual rear wheels
63 — 4.30 non-limited slip, F-350, dual rear wheels
66 — 4.56 non-limited slip, F-350, dual rear wheels
F1 — 3.73 limited slip, F-350, dual rear wheels
F2 — 4.10 limited slip, F-350, dual rear wheels
F3 — 4.30 limited slip, F-350, dual rear wheels
F6 — 4.56 limited slip, F-350, dual rear wheels
81 — 3.73 non-limited slip, F-350, narrow frame, dual rear wheels
82 — 4.10 non-limited slip, F-350, narrow frame, dual rear wheels
83 — 4.30 non-limited slip, F-350, narrow frame, dual rear wheels
86 — 4.56 non-limited slip, F-350, narrow frame, dual rear wheels
88 — 4.88 non-limited slip, F-350, narrow frame, dual rear wheels
E1 — 3.73 limited slip, F-350, narrow frame, dual rear wheels
E2 — 4.10 limited slip, F-350, narrow frame, dual rear wheels
EW — 4.10 limited slip, F-350, narrow frame, dual rear wheels
E3 — 4.30 limited slip, F-350, narrow frame, dual rear wheels
E6 — 4.56 limited slip, F-350, narrow frame, dual rear wheels
78 — 4.88 non-limited slip, F-450, Chassis Cab, dual rear wheels
75 — 5.38 non-limited slip, F-450, Chassis Cab, dual rear wheels
G8 — 4.88 limited slip, F-450, Chassis Cab, dual rear wheels
G5 — 5.38 limited slip, F-450, Chassis Cab, dual rear wheels
GW — 4.10 limited slip, F-450, Chassis Cab, dual rear wheels
98 — 4.88 non-limited slip, F-550, Chassis Cab, dual rear wheels
95 — 5.38 non-limited slip, F-550, Chassis Cab, dual rear wheels
K8 — 4.88 limited slip, F-550, Chassis Cab, dual rear wheels
K5 — 5.38 limited slip, F-550, Chassis Cab, dual rear wheels
KW — 4.10 limited slip, F-550, Chassis Cab, dual rear wheels
75 — Dana 80, 11,000 pounds GVWR, F53 Recreational Stripped Chassis, Motorhome
95 — Dana 135, 13,500 pounds GVWR, F53 Recreational Stripped Chassis, Motorhome

 

Folks, Thanks!
I had some trouble recently. One wheel got to spinning as it was in the mud the driver;s wheel that was on the cement just sat there and didn't help at all to move the truck.
What a good technique to overcome this issue?


OH I have 350 pounds of extra weight aft of the rear wheels (Between the wheel wells and the tailgate.

Thanks for the help!
Eric