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Looking for aftermarket parts to modify or upgrade your Mercury Cougar with differentials? At Tunersports.com we carry a huge selection of the top name brand performance differential parts and accessories.
 OUT OF STOCK YDGF7.5-28Yukon Dura Grip is a positraction limited slip differential that provides smooth yet aggressive traction, giving you the confidence and performance you need across a wide variety of terrains. The Dura Grip is engineered for long life and is completely rebuildable. Dura Grips are constructed with a h... Yukon Gear Dura Grip For Ford 7.5in 1980-1982 Mercury Cougar XR-7 1981-1986 Mercury Cougar Base 1982-1982 Mercury Cougar GS 1982-1988 Mercury Cougar LS 1984-1988 Mercury Cougar XR-7 $865.89 |
 IN STOCK - LOW YDGF8.8-28-1Yukon Dura Grip is a positraction limited slip differential that provides smooth yet aggressive traction, giving you the confidence and performance you need across a wide variety of terrains. The Dura Grip is engineered for long life and is completely rebuildable. Dura Grips are constructed with a h... Yukon Gear Dura Grip Positraction For Ford 8.8in w/28 Spline Axles 1979-1979 Mercury Cougar Base 1979-1982 Mercury Cougar XR-7 1981-1986 Mercury Cougar Base 1982-1982 Mercury Cougar GS 1982-1992 Mercury Cougar LS 1984-1997 Mercury Cougar XR-7 $910.89 |
 IN STOCK - DROPSHIPS YGLF8-28Everything about the Yukon Grizzly Locker is hardcore, its casing and gears, its advanced gear tooth design, and its impact on traction and performance. The Yukon Grizzly Locker is a mechanical positive-locking differential that's engineered for rock crawling, serious trail running, off-road racing,... Yukon Gear Grizzly Locker For Ford 8in w/ 28 Spline Axles 1967-1970 Mercury Cougar Base / XR-7 1969-1970 Mercury Cougar Boss 302 / Boss 429 / Cobra Jet $988.89 |
 IN STOCK - DROPSHIPS YGLF8-31Everything about the Yukon Grizzly Locker is hardcore, its casing and gears, its advanced gear tooth design, and its impact on traction and performance. The Yukon Grizzly Locker is a mechanical positive-locking differential that's engineered for rock crawling, serious trail running, off-road racing,... Yukon Gear Grizzly Locker For Ford 8in w/ 31 Spline Axles 1967-1970 Mercury Cougar Base / XR-7 1969-1970 Mercury Cougar Boss 302 / Boss 429 / Cobra Jet $988.89 |
 OUT OF STOCK YGLF8.8-28Everything about the Yukon Grizzly Locker is hardcore, its casing and gears, its advanced gear tooth design, and its impact on traction and performance. The Yukon Grizzly Locker is a mechanical positive-locking differential that's engineered for rock crawling, serious trail running, off-road racing,... Yukon Gear Grizzly Locker / Ford 8.8in w/ 28 Splines 1979-1979 Mercury Cougar Base 1979-1982 Mercury Cougar XR-7 1981-1986 Mercury Cougar Base 1982-1982 Mercury Cougar GS 1982-1992 Mercury Cougar LS 1984-1997 Mercury Cougar XR-7 $1,208.89 |
 IN STOCK - LOW YGLF8.8-31Everything about the Yukon Grizzly Locker is hardcore, its casing and gears, its advanced gear tooth design, and its impact on traction and performance. The Yukon Grizzly Locker is a mechanical positive-locking differential that's engineered for rock crawling, serious trail running, off-road racing,... Yukon Gear Grizzly Locker / Ford 8.8in w/ 31 Splines 1979-1979 Mercury Cougar Base 1979-1982 Mercury Cougar XR-7 1981-1986 Mercury Cougar Base 1982-1982 Mercury Cougar GS 1982-1988 Mercury Cougar LS 1984-1988 Mercury Cougar XR-7 $1,208.89 |
 IN STOCK - DROPSHIPS YGLF9-28Everything about the Yukon Grizzly Locker is hardcore, its casing and gears, its advanced gear tooth design, and its impact on traction and performance. The Yukon Grizzly Locker is a mechanical positive-locking differential that's engineered for rock crawling, serious trail running, off-road racing,... Yukon Gear Grizzly Locker For Ford 9in w/ 28 Spline Axles 1967-1973 Mercury Cougar Base 1967-1979 Mercury Cougar XR-7 1969-1970 Mercury Cougar Boss 302 / Boss 429 / Cobra Jet 1977-1977 Mercury Cougar Brougham / Villager 1977-1979 Mercury Cougar Base $1,012.89 |
 IN STOCK - DROPSHIPS YGLF9-31Everything about the Yukon Grizzly Locker is hardcore, its casing and gears, its advanced gear tooth design, and its impact on traction and performance. The Yukon Grizzly Locker is a mechanical positive-locking differential that's engineered for rock crawling, serious trail running, off-road racing,... Yukon Gear Grizzly Locker For Ford 9in w/ 31 Spline Axles 1967-1973 Mercury Cougar Base 1967-1979 Mercury Cougar XR-7 1969-1970 Mercury Cougar Boss 302 / Boss 429 / Cobra Jet 1977-1977 Mercury Cougar Brougham / Villager 1977-1979 Mercury Cougar Base $988.89 |
 IN STOCK - DROPSHIPS YGLF9-31-LBEverything about the Yukon Grizzly Locker is hardcore, its casing and gears, its advanced gear tooth design, and its impact on traction and performance. The Yukon Grizzly Locker is a mechanical positive-locking differential that's engineered for rock crawling, serious trail running, off-road racing,... Yukon Gear Grizzly Locker For Ford 9in w/ 31 Spline Axles / Fits Load Bolt Housing 1967-1973 Mercury Cougar Base 1967-1979 Mercury Cougar XR-7 1969-1970 Mercury Cougar Boss 302 / Boss 429 / Cobra Jet 1977-1977 Mercury Cougar Brougham / Villager 1977-1979 Mercury Cougar Base $1,060.89 |
 IN STOCK - DROPSHIPS YGLF9-31-RACEEverything about the Yukon Grizzly Locker is hardcore, its casing and gears, its advanced gear tooth design, and its impact on traction and performance. The Yukon Grizzly Locker is a mechanical positive-locking differential that's engineered for rock crawling, serious trail running, off-road racing,... Yukon Gear Grizzly Locker For Ford 9in w/ 31 Spline Axles / Racing Design 1967-1973 Mercury Cougar Base 1967-1979 Mercury Cougar XR-7 1969-1970 Mercury Cougar Boss 302 / Boss 429 / Cobra Jet 1977-1977 Mercury Cougar Brougham / Villager 1977-1979 Mercury Cougar Base $1,297.89 |
 IN STOCK - LOW YGLF9-35Everything about the Yukon Grizzly Locker is hardcore, its casing and gears, its advanced gear tooth design, and its impact on traction and performance. The Yukon Grizzly Locker is a mechanical positive-locking differential that's engineered for rock crawling, serious trail running, off-road racing,... Yukon Gear Grizzly Locker For Ford 9in w/ 35 Spline Axles 1967-1973 Mercury Cougar Base 1967-1979 Mercury Cougar XR-7 1969-1970 Mercury Cougar Boss 302 / Boss 429 / Cobra Jet 1977-1977 Mercury Cougar Brougham / Villager 1977-1979 Mercury Cougar Base $988.89 |
 IN STOCK - DROPSHIPS YGLF9-35-LBEverything about the Yukon Grizzly Locker is hardcore, its casing and gears, its advanced gear tooth design, and its impact on traction and performance. The Yukon Grizzly Locker is a mechanical positive-locking differential that's engineered for rock crawling, serious trail running, off-road racing,... Yukon Gear Grizzly Locker / Ford 9in w/ 35 Splines / For Use w/ Load Bolt Dropout 1967-1973 Mercury Cougar Base 1967-1979 Mercury Cougar XR-7 1969-1970 Mercury Cougar Boss 302 / Boss 429 / Cobra Jet 1977-1977 Mercury Cougar Brougham / Villager 1977-1979 Mercury Cougar Base $1,065.89 |
 OUT OF STOCK YGLF9-35-RACEEverything about the Yukon Grizzly Locker is hardcore, its casing and gears, its advanced gear tooth design, and its impact on traction and performance. The Yukon Grizzly Locker is a mechanical positive-locking differential that's engineered for rock crawling, serious trail running, off-road racing,... Yukon Gear Grizzly Locker For Ford 9in Diff w/ 35 Spline Axles / Racing Design 1967-1973 Mercury Cougar Base 1967-1979 Mercury Cougar XR-7 1969-1970 Mercury Cougar Boss 302 / Boss 429 / Cobra Jet 1977-1977 Mercury Cougar Brougham / Villager 1977-1979 Mercury Cougar Base $1,261.89 |
 IN STOCK - DROPSHIPS YGLF9-35-RACE-LBEverything about the Yukon Grizzly Locker is hardcore, its casing and gears, its advanced gear tooth design, and its impact on traction and performance. The Yukon Grizzly Locker is a mechanical positive-locking differential that's engineered for rock crawling, serious trail running, off-road racing,... Yukon Gear Grizzly Locker For Ford 9in Diff w/ 35 Spline Axles / Racing Design / For Load Bolt D/O 1967-1973 Mercury Cougar Base 1967-1979 Mercury Cougar XR-7 1969-1970 Mercury Cougar Boss 302 / Boss 429 / Cobra Jet 1977-1977 Mercury Cougar Brougham / Villager 1977-1979 Mercury Cougar Base $1,267.89 |
 IN STOCK - DROPSHIPS YP MINSF8.8-28Yukon mini spools provide the traction of a full spool at an economical cost.... Yukon Gear Mini Spool For Ford 8.8in w/ 28 Spline Axles 1979-1979 Mercury Cougar Base 1979-1982 Mercury Cougar XR-7 1981-1986 Mercury Cougar Base 1982-1982 Mercury Cougar GS 1982-1988 Mercury Cougar LS 1984-1988 Mercury Cougar XR-7 $263.89 |
 IN STOCK YP MINSF8.8-31Yukon mini spools provide the traction of a full spool at an economical cost.... Yukon Gear Mini Spool For Ford 8.8in w/ 31 Spline Axles 1979-1979 Mercury Cougar Base 1979-1982 Mercury Cougar XR-7 1981-1986 Mercury Cougar Base 1982-1982 Mercury Cougar GS 1982-1988 Mercury Cougar LS 1984-1988 Mercury Cougar XR-7 $265.89 |
 IN STOCK - DROPSHIPS YP MINSF9-28Yukon Mini Spools are a low-cost traction option for vehicles looking for full-time lockup. The mini spool installs into a standard open carrier and delivers 100% power to both tires at all times. These units are not recommended for street-driven vehicles. Full spools are recommended for vehicles wi... Yukon Gear Mini Spool For Ford 9in w/ 28 Spline Axles 1967-1973 Mercury Cougar Base 1967-1979 Mercury Cougar XR-7 1969-1970 Mercury Cougar Boss 302 / Boss 429 / Cobra Jet 1977-1977 Mercury Cougar Brougham / Villager 1977-1979 Mercury Cougar Base $67.89 |
 IN STOCK - DROPSHIPS YP MINSF9-31Yukon Mini Spools are a low-cost traction option for vehicles looking for full-time lockup. The mini spool installs into a standard open carrier in place of the spider gears and delivers 100% power to both tires at all times. These units are not recommended for street-driven vehicles. Full spools ar... Yukon Gear Mini Spool For Ford 9in w/ 31 Spline Axles 1967-1973 Mercury Cougar Base 1967-1979 Mercury Cougar XR-7 1969-1970 Mercury Cougar Boss 302 / Boss 429 / Cobra Jet 1977-1977 Mercury Cougar Brougham / Villager 1977-1979 Mercury Cougar Base $66.89 |
 IN STOCK - DROPSHIPS SL F8.8-31USA Standard Spartan Locker For Ford 8.8in / 31 Spline / Incl. Heavy-Duty Cross Pin Shaft 1979-1979 Mercury Cougar Base 1979-1982 Mercury Cougar XR-7 1981-1986 Mercury Cougar Base 1982-1982 Mercury Cougar GS 1982-1988 Mercury Cougar LS 1984-1988 Mercury Cougar XR-7 $660.89 |
 IN STOCK - DROPSHIPS SL F9-28-31USA Standard Spartan Locker For Ford 9in / 28 or 31 Spline 1967-1973 Mercury Cougar Base 1967-1979 Mercury Cougar XR-7 1969-1970 Mercury Cougar Boss 302 / Boss 429 / Cobra Jet 1977-1977 Mercury Cougar Brougham / Villager 1977-1979 Mercury Cougar Base $595.89 |
 IN STOCK - DROPSHIPS SL XP-F8.8USA Standard Spartan Locker 8.8in Ford Spartan Locker Cross Pin 1979-1979 Mercury Cougar Base 1981-1986 Mercury Cougar Base 1982-1982 Mercury Cougar GS 1982-1992 Mercury Cougar LS $56.89 |
 IN STOCK - DROPSHIPS SL XP-F9-LUSA Standard Spartan Locker 9in Ford Spartan Locker Cross Pin / Long 1967-1973 Mercury Cougar Base 1967-1979 Mercury Cougar XR-7 1969-1970 Mercury Cougar Boss 302 / Boss 429 / Cobra Jet 1977-1977 Mercury Cougar Brougham / Villager 1977-1979 Mercury Cougar Base $56.89 |
 IN STOCK - DROPSHIPS SL XP-F9-SUSA Standard Spartan Locker 9in Ford Spartan Locker Cross Pin / Short 1967-1973 Mercury Cougar Base 1967-1979 Mercury Cougar XR-7 1969-1970 Mercury Cougar Boss 302 / Boss 429 / Cobra Jet 1977-1977 Mercury Cougar Brougham / Villager 1977-1979 Mercury Cougar Base $40.38 |
 IN STOCK - DROPSHIPS SL XP-F9-XSUSA Standard Spartan Locker 9in Ford Spartan Locker Cross Pin / Extra Short 1967-1973 Mercury Cougar Base 1967-1979 Mercury Cougar XR-7 1969-1970 Mercury Cougar Boss 302 / Boss 429 / Cobra Jet 1977-1977 Mercury Cougar Brougham / Villager 1977-1979 Mercury Cougar Base $36.62 |
 IN STOCK - DROPSHIPS YP FSF9-31-LWYukon Full Spools are a cost-effective way to convert a diff to 100% lockup. Installation is easy as they install in place of your differential carrier assembly. Each Yukon spool is made from high-quality 8620 steel and heat treated for additional strength. A spool is an outstanding choice for dedic... Yukon Gear Lightweight Steel Spool For Ford 9in w/ 31 Spline Axles 1967-1973 Mercury Cougar Base 1967-1979 Mercury Cougar XR-7 1969-1970 Mercury Cougar Boss 302 / Boss 429 / Cobra Jet 1977-1977 Mercury Cougar Brougham / Villager 1977-1979 Mercury Cougar Base $341.89 |