Looking for aftermarket parts to modify or upgrade your 1981 Ford Bronco with differentials? At Tunersports.com we carry a huge selection of the top name brand performance differential parts and accessories.

IN STOCK - LOW YDGD44-3-30-1The Yukon Dura Grip provides aggressive yet smooth traction to give you the confidence and performance you need. Get longer life and better traction with the heavy duty Yukon Dura Grip Positraction.... Yukon Gear Dura Grip For Dana 44 / 30 Spline / 3.73 & Down 1975-1993 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $901.89 |
IN STOCK YDGD44-4-30-1The Yukon Dura Grip provides aggressive yet smooth traction to give you the confidence and performance you need. Get longer life and better traction with the heavy duty Yukon Dura Grip Positraction.... Yukon Gear Dura Grip For Dana 44 / 30 Spline / 3.92+ 1975-1993 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $900.89 |

OUT OF STOCK YGLD44-3-30Everything 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 / Fits Dana 44 / 30 Spline / 3.73 & Down 1975-1993 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $1,098.89 |
OUT OF STOCK YGLD44-4-30Everything 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 Dana 44 Grizzly Locker Replacement 1975-1993 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $1,062.89 |
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 1975-1986 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $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 1975-1986 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $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 1975-1986 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $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 1975-1986 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $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 1975-1986 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $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 1975-1986 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $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 1975-1986 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $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 1975-1986 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $1,267.89 |

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 1975-1986 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $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 1975-1986 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $66.89 |

IN STOCK - DROPSHIPS SL D44-30The Spartan Locker by USA Standard Gear provides reliable traction at a low cost. The Spartan Locker's patent pending design replaces the spider gears in a standard carrier case, does not use the thrust washers, and has a revolutionary spring-and-pin design that makes installation even easier! This ... USA Standard Spartan Locker For Dana 44 Diff w/ 30 Spline Axles / Incl. Heavy-Duty Cross Pin Shaft 1975-1993 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $710.89 |
IN STOCK - DROPSHIPS SL F9-28-31USA Standard Spartan Locker For Ford 9in / 28 or 31 Spline 1975-1986 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $595.89 |
IN STOCK - DROPSHIPS SL XP-D44USA Standard Spartan Locker Replacement Cross Pin For Dana 44 1975-1993 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $56.89 |
IN STOCK - DROPSHIPS SL XP-F9-LUSA Standard Spartan Locker 9in Ford Spartan Locker Cross Pin / Long 1975-1986 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $56.89 |
IN STOCK - DROPSHIPS SL XP-F9-SUSA Standard Spartan Locker 9in Ford Spartan Locker Cross Pin / Short 1975-1986 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $40.38 |
IN STOCK - DROPSHIPS SL XP-F9-XSUSA Standard Spartan Locker 9in Ford Spartan Locker Cross Pin / Extra Short 1975-1986 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $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 1975-1986 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $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 1975-1986 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $1,606.89 |
IN STOCK - DROPSHIPS YDGF9-28-AGYukon 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 Trac Loc For Ford 9in With 28 Spline Axles. Aggressive Design 1975-1986 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $908.89 |
IN STOCK - LOW YDGF9-28-SMYukon 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 Tracloc For Ford 9in With 28 Spline Axles. Street Design 1975-1986 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $908.89 |
IN STOCK - DROPSHIPS YDGF9-31-AGYukon 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 Trac Loc For Ford 9in With 31 Spline Axles. Aggressive Design 1975-1986 Ford Bronco Custom 1978-1981 Ford Bronco Ranger XLT $906.89 |