Hey I was wondering how the easiest way to tell what size gearing I have. any knid of suggestions would help.

Thanks CN

 

I think there is a tag on the cover of the rearend. Pretty sure it shows ratio.

 

This is what I did, Write down the numbers on the rear end tag, call your local dealer, tell them the # on the tag, and BEFORE you can get all the # out they can tell you your gear ratio, good luck, let us know!

 

I guess the certification tag on the door post has that info as well. Match it up with this: BTW, this info and a lot more is on the sticky at the top of the page in the super duty / heavy duty forum.

Axle Type
31 — 3.73 non-limited slip, F-250/Excursion
C1 — 3.73 limited slip, F-250/Excursion
32 — 4.10 non-limited slip, F-250
C2 — 4.10 limited slip, F-250/Excursion
33 — 4.30 non-limited slip, F-250
C3 — 4.30 limited slip, F-250/Excursion
36 — 4.56 non-limited slip, F-250
C6 — 4.56 limited slip, F-250
41 — 3.73 non-limited slip, F-350 (single rear wheels)
D1 — 3.73 limited slip, F-350 (single rear wheels)
42 — 4.10 non-limited slip, F-350 (single rear wheels)
D2 — 4.10 limited slip, F-350 (single rear wheels)
43 — 4.30 non-limited slip, F-350 (single rear wheels)
D3 — 4.30 limited slip, F-350 (single rear wheels)
46 — 4.56 non-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)
F1 — 3.73 limited slip, F-350 (dual rear wheels)
62 — 4.10 non-limited slip, F-350 (dual rear wheels)
F2 — 4.10 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)
F6 — 4.56 limited slip, F-350 (dual rear wheels)
81 — 3.73 non-limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
E1 — 3.73 limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
82 — 4.10 non-limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
E2 — 4.10 limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
83 — 4.30 non-limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
E3 — 4.30 limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
86 — 4.56 non-limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
E6 — 4.56 limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
88 — 4.88 non-limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
EW — 4.88 limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
G3 — 4.30 limited slip, F-450 Chassis Cab
73 — 4.30 non-limited slip, F-450 Chassis Cab
78 — 4.88 non-limited slip, F-450 Chassis Cab
G8 — 4.88 limited slip, F-450 Chassis Cab
75 — 5.38 non-limited slip, F-450 Chassis Cab
G5 — 5.38 limited slip, F-450 Chassis Cab
GW — 4.10 limited slip, F-450 Chassis Cab
98 — 4.88 non-limited slip, F-550 Chassis Cab
K8 — 4.88 limited slip, F-550 Chassis Cab
95 — 5.38 non-limited slip, F-550 Chassis Cab
K5 — 5.38 limited slip, F-550 Chassis Cab
KW — 4.10 limited slip, F-550 Chassis Cab

 

What year? Model?...any stats?


biz

 

It is a 2002 lar. CC LB V10. there is a lift on when I bought it so the height and brand of the lift are unknown. I currently have 35 tires on there, so I'm not quite sure if the grearing has been changed. Just looking at the info that hang10 gave I would prob. guess I have the 4.30. Thanks for the help

CN

 

You can also go the local Ford dealer parts dept. and give them the last 8 characters of the VIN number and they can tell you your trucks gear ratio wheel base etc. This VIN info is always useful and sometimes required for ordering parts for your specific vehicle.

 

I looked on the driver side pilar and the manufacture sticker had a spot where it read "AXLE C3" so that meaning it's a 4.30 by hang10. thanks for the info.

 

Nice ride you have there! Got lucky...with the C3 (4.30) gears...especially with the 35" tires. So many V10 2v...got the 3.73...just like mine. For the OEM stock size tires...no problem, but I still wish I had the 4.30. So...I would be able to install larger tires with minimal effect.


biz