1966 Mustang

1966 Mustang – Axle Information

1966 Ford Mustang Axle Information & Ratios

The first table is the code and gear ratio. If you know your axle tag number, simply go to the second table.

Axle code Ratio & type
6 2.80 open differential
F 2.80 locking differential
2 2.83 open differential
B 2.83 locking differential
1 3.00 open differential
A 3.00 locking differential
3 3.20 open differential
C 3.20 locking differential
4 3.25 open differential
D 3.25 locking differential
5 3.50 open differential
E 3.50 locking differential
8 3.89 open differential
H 3.89 locking differential
9 4.11 open differential
I 4.11 locking differential

Years 1965 – 1968

Year Tag Code  Type Ring Gear Diameter Ratio :1 Ring Teeth Pinion Teeth
1966 WCZ-E Conventional 7.75 2.8 42 15
1966 WDJ-B Limited Slip 7.75 2.8 42 15
1966 WCX-F Conventional 8.0 3.00 39 13
1966 WDJ-C Limited Slip 8.0 3.00 39 13
1966 WCZ-S Conventional 8.75 3.50 35 10
1966 WCZ-R Conventional 8.75 3.89 35 9
1966 WDZ-A Limited Slip 7.75 2.80 42 15
1966 WDW-C Conventional 8.0 3.25 39 12
1966 WDW-E Conventional 7.75 2.80 42 15
1966 WDW-A Conventional 7.75 2.80 42 15
1966 WDW-D Conventional 8.00 3.50 35 10
1966 WDZ-C Limited Slip 8.00 3.25 39 12

 

Year Tag Code Type Ring Gear Diameter Ratio :1 Ring Teeth Pinion Teeth
1966 WDW-B Conventional 8 3.00 39 13
1966 WDC-B Limited Slip 8 3.00 39 13
1966 WDE-B Conventional 9 3.00 39 13
1966 WEB-C Conventional 9 3.25 39 12
1966 WED-C Limited Slip 9 3.00 39 13
1966 WED-A Limited Slip 9 3.25 39 12
1966 WDY-B Conventional 8 3.25 39 12
1966 WDY-C Conventional 8 3.50 35 10
1966 WEA-B Limited Slip 8 3.50 35 10
1966 WDY-A Conventional 8 3.00 39 13
1966 WEA-F Limited Slip 8 3.25 39 12
1966 WEA-A Limited Slip 8 3.00 39 13
1966 WEC-A Conventional 9 3.00 39 13
1966 WEC-B Conventional 9 3.25 39 12
1966 WEE-A Limited Slip 9 3.25 39 12
1966 WEE-C Limited Slip 9 3.00 39 13
1966 WCY-R Conventional 7.25 2.83 34 12
1966 WCY-AA Limited Slip 7.25 2.83 34 12
1966 WCY-E Conventional 7.25 3.20 32 10
1966 WCY-AJ Conventional 7.25 3.20 32 10
1966 WCY-L Limited Slip 7.25 3.20 32 10

 

Ratio

 Locking 1966
2.80
6
2.80
Yes F
2.83
2
2.83
Yes B
3.00
1
3.00
Yes A
3.20
3
3.20
Yes C
3.25
4
3.25
Yes D
3.50
5
3.50
Yes E
3.89
8
3.89
Yes H
4.11
9
4.11
Yes I