Hello everyone,
I have a question on a rear axle swap for my 2004 Ford Excursion Diesel, what is the difference in rear axles? Obviously there's a difference between limited slip and not, but what are the differences in the other codes?
I have axle code:
C1 — 3.73 limited slip, F-250/Excursion

This car is for resale, so I do not care if it is limited slip or not. Are any of the following direct swaps with different ring sizes? As long as I can direct bolt on I just want the most economical option.

Here are my options:
31 — 3.73 non-limited slip, F-250/Excursion
41 — 3.73 non-limited slip, F-350
81 — 3.73 non-limited slip, F-350
D1 — 3.73 limited slip, F-350



I believe these are dually only, correct me if I am wrong:
61 — 3.73 non-limited slip, F-350
F1 — 3.73 limited slip, F-350


I got this list online:
The following lists the gear ratios on rear axles.

31 — 3.73 non-limited slip, F-250/Excursion
32 — 4.10 non-limited slip, F-250
41 — 3.73 non-limited slip, F-350
61 — 3.73 non-limited slip, F-350
73 — 4.30 non-limited slip, F-450
75 — 5.38 non-limited slip, F-450
78 — 4.88 non-limited slip, F-450
81 — 3.73 non-limited slip, F-350
88 — 4.88 non-limited slip, F-350
95 — 5.38 non-limited slip, F-550
98 — 4.88 non-limited slip, F-550
C1 — 3.73 limited slip, F-250/Excursion
C2 — 4.10 limited slip, F-250/Excursion
C3 — 4.30 limited slip, F-250/Excursion
D1 — 3.73 limited slip, F-350
D2 — 4.10 limited slip, F-350
D3 — 4.30 limited slip, F-350
E2 — 4.10 limited slip, F-350
E3 — 4.30 limited slip, F-350
EW — 4.10 limited slip, F-350 (ambulance package)
F1 — 3.73 limited slip, F-350
F2 — 4.10 limited slip, F-350
F6 — 4.56 limited slip, F-350
G3 — 4.30 limited slip, F-450
G5 — 5.38 limited slip, F-450
G8 — 4.88 limited slip, F-450
GW — 4.88 non-limited slip, F-450 (wide frame)
K5 — 5.38 limited slip, F-550
K8 — 4.88 limited slip, F-550
KW — 4.88 non-limited slip, F-550 (wide frame)

 

Forget the part numbers just get ANY axle from a 99-04 250/350 srw truck or ANY axle from an excursion as long as the gear ratios are the same. I do believe the excursion used a different flange on their axles so u might have to swap that