My 04' 2500HD with 6.0 vs 2009 Ford F250 V10. Update!

APT wrote:
There should be a sticker on your driver's door with Axle Code for Ford Trucks and Excursion. 3.73 is standard. 4.10 optional for 2WD, 4.30 optional for 4WD. Should be one of these:

31 - open - 3.73
32 - open - 4.10
33 - open -4.30
C1 - L/S - 3.73
C2 - L/S - 4.10
C3 - L/S - 4.30

Perhaps I could add a bit of clarification. Speaking for the gas engines only, the 3.73 gears were only available with the V8 5.4 with the 4.10s optional.

The V10's standard ratio is the 4.10 and the 4.30s were optional.

S