1969 Ford Mustang Axle Information & Ratios
| Ratio | Locking | 1969 | 1970 | 1971 | 1972 | 1973 |
| 2.35 | F | |||||
| 2.75 | 2 | 2 | 2 | 2 | 2 | |
| 2.75 | Locking | K | K | K | K | K |
| 2.79 | 3 | 3 | 3 | 3 | 3 | |
| 2.80 | 4 | 4 | 4 | |||
| 2.80 | Locking | M | M | M | ||
| 2.83 | 5 | 5 | ||||
| 3.00 | 6 | 6 | 6 | 6 | 6 | |
| 3.00 | Locking | O | O | |||
| 3.07 | B | B | ||||
| 3.08 | C | C | ||||
| 3.08 | Locking | U | ||||
| 3.10 | 7 | |||||
| 3.20 | 8 | |||||
| 3.25 | 9 | 9 | 9 | |||
| 3.25 | Locking | R | R | R | ||
| 3.50 | A | A | 9 | A | 9 | |
| 3.50 | Locking | S | S | R | S | R |
| 3.89 | A | |||||
| 3.89 | Locking | S | ||||
| 3.91 | Locking | V | V | V | ||
| 4.11 | Locking | V | ||||
| 4.30 | Locking | W | W | Y |
| Year | Tag Code | Type | Ring Gear Diameter | Ratio :1 | Ring Teeth | Pinion Teeth |
| 69/70 | WDW-C1 | Conventional | 8.00 | 3.25 | 39 | 12 |
| 69/70 | WDW-F | Conventional | 8.00 | 3.00 | 39 | 13 |
| 69/70 | WDW-J | Conventional | 8.00 | 2.79 | 39 | 14 |
| 69/70 | WDW-K | Conventional | 8.00 | 2.79 | 39 | 14 |
| 69/70 | WDY-A1 | Conventional | 8.00 | 3.00 | 39 | 13 |
| 69/70 | WDY-B1 | Conventional | 8.00 | 3.25 | 39 | 12 |
| 69/70 | WDZ-B1 | Limited Slip | 8.00 | 3.00 | 39 | 13 |
| 69/70 | WDZ-E | Limited Slip | 8.00 | 3.00 | 39 | 13 |
| Year | Tag Code | Type | Ring Gear Diameter | Ratio :1 | Ring Teeth | Pinion Teeth |
| 69/70 | WEA-A1 | Limited Slip | 8.00 | 3.00 | 39 | 13 |
| 69/70 | WEA-F1 | Limited Slip | 8.00 | 3.25 | 39 | 12 |
| 69/70 | WEB-E6 | Conventional | 9.00 | 3.00 | 39 | 13 |
| 69/70 | WEB-F6 | Conventional | 9.00 | 3.25 | 39 | 12 |
| 69/70 | WEB-H2 | Conventional | 9.00 | 2.75 | 44 | 16 |
| 69/70 | WEB-L | Conventional | 9.00 | 3.50 | 35 | 10 |
| 69/70 | WEB-M | Conventional | 9.00 | 3.00 | 39 | 13 |
| 69/70 | WEB-N | Conventional | 9.00 | 3.00 | 39 | 13 |
| 69/70 | WEB-P | Conventional | 9.00 | 2,75 | 44 | 16 |
| 69/70 | WEB-R | Conventional | 9.00 | 3.00 | 39 | 13 |
| 69/70 | WEB-S | Conventional | 9.00 | 3.25 | 39 | 12 |
| 69/70 | WEB-T | Conventional | 9.00 | 3.25 | 39 | 12 |
| 69/70 | WEB-U | Conventional | 8.75 | 3.25 | 39 | 12 |
| 69/70 | WEC-D5 | Conventional | 9.00 | 3.00 | 39 | 13 |
| 69/70 | WEC-E5 | Conventional | 9.00 | 3.25 | 39 | 12 |
| 69/70 | WEC-H | Conventional | 9.00 | 3.00 | 39 | 13 |
| 69/70 | WEC-J | Conventional | 8.75 | 3.00 | 39 | 13 |
| 69/70 | WEC-K | Conventional | 9.00 | 3.00 | 39 | 13 |
| 69/70 | WEC-L | Conventional | 9.00 | 3.25 | 39 | 12 |
| 69/70 | WEC-M | Conventional | 8.75 | 3.25 | 39 | 12 |
| 69/70 | WEC-N | Conventional | 9.00 | 3.25 | 39 | 12 |
| 69/70 | WEC-R | Conventional | 9.00 | 3.50 | 35 | 10 |
| 69/70 | WES-F | Conventional | 9.00 | 3.00 | 39 | 13 |
| Year | Tag Code | Type | Ring Gear Diameter | Ratio :1 | Ring Teeth | Pinion Teeth |
| 69/70 | WES-G1 | Limited Slip | 9.00 | 3.25 | 39 | 12 |
| 69/70 | WES-M | Conventional | 9.00 | 3.25 | 39 | 12 |
| 69/70 | WES-N | Conventional | 8.75 | 3.00 | 39 | 13 |
| 69/70 | WES-P | Conventional | 8.75 | 3.25 | 39 | 12 |
| 69/70 | WES-S1 | Conventional | 9.00 | 2.75 | 44 | 16 |
| 69/70 | WES-T1 | Conventional | 9.00 | 2.75 | 44 | 16 |
| 69/70 | WES-U | Conventional | 9.00 | 3.50 | 35 | 10 |
| 69/70 | WES-AA | Conventional | 9.00 | 3.00 | 39 | 13 |
| 69/70 | WES-AB | Conventional | 9.00 | 3.25 | 39 | 12 |
| 69/70 | WES-AC | Conventional | 9.00 | 3.00 | 39 | 13 |
| 69/70 | WES-AD | Conventional | 9.00 | 3.25 | 39 | 12 |
| 69/70 | WFA-A | Traction Loc | 9.00 | 3.25 | 39 | 12 |
| 69/70 | WFA-C | Traction Loc | 9.00 | 3.25 | 39 | 12 |
| 69/70 | WFA-D | Traction Loc | 9.00 | 3.25 | 39 | 12 |
| 69/70 | WFA-E | Traction Loc | 9.00 | 3.00 | 39 | 13 |
| 69/70 | WFB-A | Traction Loc | 9.00 | 3.25 | 39 | 12 |
| 69/70 | WFB-C | Traction Loc | 9.00 | 3.25 | 39 | 12 |
| 69/70 | WFC-A | Traction Loc | 9.00 | 3.50 | 35 | 10 |
| 69/70 | WFC-B | Traction Loc | 9.00 | 3.91 | 43 | 11 |
| 69/70 | WFC-C | Traction Loc | 9.00 | 4.30 | 43 | 10 |
| 69/70 | WFC-D | Traction Loc | 9.00 | 3.91 | 43 | 11 |
| 69/70 | WFC-E | Traction Loc | 9.00 | 4.30 | 43 | 10 |
| 69/70 | WFC-F | Traction Loc | 9.00 | 3.91 | 43 | 11 |
| Year | Tag Code | Type | Ring Gear Diameter | Ratio :1 | Ring Teeth | Pinion Teeth |
| 69/70 | WFC-S | Traction Loc | 9.00 | 3.60 | 36 | 10 |
| 69/70 | WFC-K | Traction Loc | 9.00 | 4.30 | 43 | 10 |
| 69/70 | WFC-G | Traction Loc | 9.00 | 3.00 | 39 | 13 |
| 69/70 | WFD-A | Traction Loc | 9.00 | 3.50 | 35 | 10 |
| 69/70 | WFD-B | Traction Loc | 9.00 | 3.91 | 43 | 11 |
| 69/70 | WFD-C | Traction Loc | 9.00 | 4.30 | 43 | 10 |
| 69/70 | WFD-H | Traction Loc | 9.00 | 3.25 | 39 | 12 |
I have a huge challenge ahead of me… I purchased a partially restored / cloned 1969 Mustang coup – with a 1968 429 Thunder jet engine…. engine rebuilt (new cam, bearings, pistons, rings, valves, springs, oil pump, etc. (trying to figure out the new push rod size now) (work in process)… it is a bit of a frankenstein… but with awesome potential if finished right! The 429 should Dyno at around 450 hp…
My questions are:
1. It has a C4 transmission – DO I need a high HP kit for the c$ or should it be OK stock?
2. The Axel / differential tag shows: (Hard to Read but looks like)
WCZ – V1
2 79 (or T9 or 19) 7CC 930
Bell housing shows: C70W
4025-A
12
Can you tell me what the differential SPEC’s are from the tags above?
Thank You,
Dan
(What else do I need to think about as I work to finish the re-build)?