OE Quality
60-Day Returns

Pioneer Cables 839011 Woodruff Key
Pioneer Cables 839011 Woodruff Key
Pioneer Cables 839011 is a Woodruff key for select Ford, Mercury, and Lincoln applications that use a narrow 3/16" x 1 3/4" high-performance kit specification. It is a direct-fit hardware and service supply item for drivetrain and engine service work where the correct key profile and size are required.
Key Features
- Woodruff key for service and repair applications
- Narrow 3/16" x 1 3/4" kit specification
- Fits select Ford Mustang, Mercury Cougar, and Mercury Marquis applications
- Also listed for Ford LTD, Thunderbird, and Lincoln Continental applications
- Pioneer Cables part number 839011
Detailed Description
This Pioneer Cables Woodruff key, part number 839011, is specified for a range of classic and late-model Ford, Mercury, and Lincoln vehicles that call for a narrow 3/16" x 1 3/4" high-performance kit configuration. It is listed for 1969 and 1995 Ford Mustang, 1969-1978 Mercury Cougar, 1971-1978 Mercury Marquis, and 1977-1980 Lincoln Continental applications, along with additional coverage for Ford LTD, Thunderbird, Mercury Grand Marquis, Mercury Montego, Mercury Colony Park, and Lincoln Mark VI. Use this part when the application calls for the correct Woodruff key profile and dimensions in service or rebuild work.
Common Uses
- Replacing a worn or missing Woodruff key during engine or drivetrain service
- Restoring proper alignment between keyed components
- Addressing fitment issues caused by an incorrect key size
- Supporting repair work on Ford Mustang, Mercury Cougar, and Mercury Marquis applications
- Correcting service problems on select Ford LTD and Lincoln Continental vehicles
Installation Notes and Tips
Verify the required key size and profile before installation, since Woodruff keys are application-specific. Match the narrow 3/16" x 1 3/4" specification to the original service requirement for the vehicle and component being repaired. Confirm the part number 839011 against the vehicle service information before assembly.
Quality Assurance
Fitment is listed for 68 vehicle applications across 1969-1995 model years, including Ford Mustang, Mercury Cougar, and Mercury Marquis. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.
This part fits 68 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1995 | Ford | Mustang | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1991 | Ford | LTD Crown Victoria | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1990 | Ford | LTD Crown Victoria | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1989 | Ford | LTD Crown Victoria | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1988 | Ford | LTD Crown Victoria | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1987 | Ford | LTD Crown Victoria | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1986 | Ford | LTD | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1986 | Mercury | Grand Marquis | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1985 | Ford | LTD | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1984 | Ford | LTD | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1983 | Ford | LTD | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1982 | Ford | LTD | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1981 | Ford | LTD | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1981 | Mercury | Grand Marquis | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1981 | Mercury | Marquis | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1980 | Ford | LTD | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1980 | Lincoln | Continental | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1980 | Lincoln | Mark VI | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1980 | Mercury | Grand Marquis | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1980 | Mercury | Marquis | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1979 | Lincoln | Continental | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1978 | Ford | LTD | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1978 | Ford | Thunderbird | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1978 | Lincoln | Continental | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1978 | Mercury | Cougar | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1978 | Mercury | Grand Marquis | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1978 | Mercury | Marquis | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1977 | Ford | LTD | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1977 | Ford | Thunderbird | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1977 | Lincoln | Continental | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1977 | Mercury | Cougar | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1977 | Mercury | Grand Marquis | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1977 | Mercury | Marquis | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1976 | Ford | LTD | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1976 | Mercury | Cougar | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1976 | Mercury | Grand Marquis | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1976 | Mercury | Marquis | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1976 | Mercury | Montego | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1975 | Ford | LTD | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1975 | Mercury | Cougar | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1975 | Mercury | Grand Marquis | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1975 | Mercury | Marquis | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1975 | Mercury | Montego | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1974 | Ford | LTD | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1974 | Mercury | Colony Park | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1974 | Mercury | Cougar | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1974 | Mercury | Marquis | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1974 | Mercury | Montego | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1973 | Ford | LTD | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1973 | Mercury | Colony Park | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1973 | Mercury | Cougar | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1973 | Mercury | Marquis | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1973 | Mercury | Montego | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1972 | Ford | LTD | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1972 | Ford | Thunderbird | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1972 | Mercury | Colony Park | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1972 | Mercury | Marquis | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1972 | Mercury | Montego | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1971 | Ford | LTD | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1971 | Mercury | Colony Park | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1971 | Mercury | Cougar | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1971 | Mercury | Marquis | 6.6L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1971 | Mercury | Montego | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1970 | Mercury | Cougar | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1970 | Mercury | Montego | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1969 | Ford | Mustang | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1969 | Mercury | Cougar | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
| 1969 | Mercury | Montego | 5.8L | V8 | N/A | Kit - Hi-Perf. - Narrow - 3/16" X 1 3/4" |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.