Looking for aftermarket parts to modify or upgrade your Ford Thunderbird with differentials? At Tunersports.com we carry a huge selection of the top name brand performance differential parts and accessories.

IN STOCK - LOW 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 1980-1980 Ford Thunderbird Silver Anniversary 1980-1982 Ford Thunderbird Town Landau 1980-1988 Ford Thunderbird Base 1981-1983 Ford Thunderbird Heritage 1983-1988 Ford Thunderbird LX / Sport / Turbo 1984-1985 Ford Thunderbird Fila 1984-1986 Ford Thunderbird Elan $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 1987-1988 Ford Thunderbird Sport / Turbo 1987-1992 Ford Thunderbird Base 1987-1997 Ford Thunderbird LX 1989-1995 Ford Thunderbird Super Coupe $910.89 |
IN STOCK - LOW YDGF8.8-31-1Yukon 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/31 Spline Axles 1987-1988 Ford Thunderbird Base / LX / Sport / Turbo $901.89 |

IN STOCK - DROPSHIPS 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 1987-1988 Ford Thunderbird Sport / Turbo 1987-1992 Ford Thunderbird Base 1987-1997 Ford Thunderbird LX 1989-1995 Ford Thunderbird Super Coupe $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 1987-1988 Ford Thunderbird Base / LX / Sport / Turbo $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 1955-1979 Ford Thunderbird Base 1978-1978 Ford Thunderbird Diamond Jubilee 1978-1979 Ford Thunderbird Town Landau 1979-1979 Ford Thunderbird Heritage $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 1955-1979 Ford Thunderbird Base 1978-1978 Ford Thunderbird Diamond Jubilee 1978-1979 Ford Thunderbird Town Landau 1979-1979 Ford Thunderbird Heritage $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 1955-1979 Ford Thunderbird Base 1978-1978 Ford Thunderbird Diamond Jubilee 1978-1979 Ford Thunderbird Town Landau 1979-1979 Ford Thunderbird Heritage $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 1955-1979 Ford Thunderbird Base 1978-1978 Ford Thunderbird Diamond Jubilee 1978-1979 Ford Thunderbird Town Landau 1979-1979 Ford Thunderbird Heritage $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 1955-1979 Ford Thunderbird Base 1978-1978 Ford Thunderbird Diamond Jubilee 1978-1979 Ford Thunderbird Town Landau 1979-1979 Ford Thunderbird Heritage $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 1955-1979 Ford Thunderbird Base 1978-1978 Ford Thunderbird Diamond Jubilee 1978-1979 Ford Thunderbird Town Landau 1979-1979 Ford Thunderbird Heritage $1,065.89 |
IN STOCK - DROPSHIPS 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 1955-1979 Ford Thunderbird Base 1978-1978 Ford Thunderbird Diamond Jubilee 1978-1979 Ford Thunderbird Town Landau 1979-1979 Ford Thunderbird Heritage $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 1955-1979 Ford Thunderbird Base 1978-1978 Ford Thunderbird Diamond Jubilee 1978-1979 Ford Thunderbird Town Landau 1979-1979 Ford Thunderbird Heritage $1,267.89 |

OUT OF STOCK 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 1987-1988 Ford Thunderbird Base / LX / Sport / Turbo $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 1987-1988 Ford Thunderbird Base / LX / Sport / Turbo $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 1955-1979 Ford Thunderbird Base 1978-1978 Ford Thunderbird Diamond Jubilee 1978-1979 Ford Thunderbird Town Landau 1979-1979 Ford Thunderbird Heritage $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 1955-1979 Ford Thunderbird Base 1978-1978 Ford Thunderbird Diamond Jubilee 1978-1979 Ford Thunderbird Town Landau 1979-1979 Ford Thunderbird Heritage $66.89 |

IN STOCK - DROPSHIPS SL F8.8-31USA Standard Spartan Locker For Ford 8.8in / 31 Spline / Incl. Heavy-Duty Cross Pin Shaft 1987-1988 Ford Thunderbird Base / LX / Sport / Turbo $660.89 |
IN STOCK - DROPSHIPS SL F9-28-31USA Standard Spartan Locker For Ford 9in / 28 or 31 Spline 1955-1979 Ford Thunderbird Base 1978-1978 Ford Thunderbird Diamond Jubilee 1978-1979 Ford Thunderbird Town Landau 1979-1979 Ford Thunderbird Heritage $595.89 |
IN STOCK - DROPSHIPS SL XP-F8.8USA Standard Spartan Locker 8.8in Ford Spartan Locker Cross Pin 1987-1988 Ford Thunderbird Sport / Turbo 1987-1992 Ford Thunderbird Base 1987-1997 Ford Thunderbird LX 1989-1995 Ford Thunderbird Super Coupe $56.89 |
IN STOCK - DROPSHIPS SL XP-F9-LUSA Standard Spartan Locker 9in Ford Spartan Locker Cross Pin / Long 1955-1979 Ford Thunderbird Base 1978-1978 Ford Thunderbird Diamond Jubilee 1978-1979 Ford Thunderbird Town Landau 1979-1979 Ford Thunderbird Heritage $56.89 |
IN STOCK - DROPSHIPS SL XP-F9-SUSA Standard Spartan Locker 9in Ford Spartan Locker Cross Pin / Short 1955-1979 Ford Thunderbird Base 1978-1978 Ford Thunderbird Diamond Jubilee 1978-1979 Ford Thunderbird Town Landau 1979-1979 Ford Thunderbird Heritage $40.38 |
IN STOCK - DROPSHIPS SL XP-F9-XSUSA Standard Spartan Locker 9in Ford Spartan Locker Cross Pin / Extra Short 1955-1979 Ford Thunderbird Base 1978-1978 Ford Thunderbird Diamond Jubilee 1978-1979 Ford Thunderbird Town Landau 1979-1979 Ford Thunderbird Heritage $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 1955-1979 Ford Thunderbird Base 1978-1978 Ford Thunderbird Diamond Jubilee 1978-1979 Ford Thunderbird Town Landau 1979-1979 Ford Thunderbird Heritage $341.89 |

IN STOCK - DROPSHIPS YDAF9-370SVO-31Yukon dropout assemblies are built by expert Yukon technicians and come complete, properly shimmed and backlashed to spec. All you do is install the third member into your diff housing, bolt on the diff cover, add fluid, and roll. This unit features a nodular iron case which improves rigidity and po... Yukon Gear Ford 9in Differential w/Trac-Loc LSD Dropout Assembly 31 Spline 1955-1979 Ford Thunderbird Base 1978-1978 Ford Thunderbird Diamond Jubilee 1978-1979 Ford Thunderbird Town Landau 1979-1979 Ford Thunderbird Heritage $1,606.89 |