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GMC K15 Differentials

Looking for aftermarket parts to modify or upgrade your GMC K15 with differentials? At Tunersports.com we carry a huge selection of the top name brand performance differential parts and accessories.

Differential Parts:

Only show in-stock parts

Yukon Gear & Axle Dura Grip

IN STOCK - LOW YDGD44-3-30-1 The 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 1975-1978 GMC K15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC K15 Indy Hauler $901.89 Details
IN STOCK YDGD44-4-30-1 The 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+ 1975-1978 GMC K15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC K15 Indy Hauler $900.89 Details
IN STOCK - DROPSHIPS YDGGM12T-3-30-1 Yukon 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 Limited Slip Differential for GM 12 Bolt 30 Spl 2.76-3.42 Ratio 1975-1978 GMC K15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC K15 Indy Hauler $754.89 Details
OUT OF STOCK YDGGM12T-3-33-1 Yukon 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. Yukon Dura Grips are constructed wi... Yukon Gear Dura Grip Limited Slip Differential for GM 12 Bolt 33 Spl 2.76-3.42 Ratio 1975-1978 GMC K15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC K15 Indy Hauler $795.89 Details
IN STOCK - DROPSHIPS YDGGM12T-4-30-1 Yukon 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 GM 12 Bolt Car w/ 30 Spline Axles / 3.73+ 1975-1978 GMC K15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC K15 Indy Hauler $919.89 Details
IN STOCK - LOW YDGGM8.5-3-28-1 Yukon 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 GM 8.5in w/ 28 Spline Axles 1977-1977 GMC K15 Indy Hauler 1977-1978 GMC K15 Base / High Sierra / Sierra Classic $908.89 Details

Yukon Gear & Axle Grizzly Lockers

OUT OF STOCK YGLD44-3-30 Everything 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 1975-1978 GMC K15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC K15 Indy Hauler $1,098.89 Details
OUT OF STOCK YGLD44-4-30 Everything 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 1975-1978 GMC K15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC K15 Indy Hauler $1,062.89 Details

Yukon Gear & Axle Mini Spools

IN STOCK - DROPSHIPS YP MINSD44-30 Yukon 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 Dana Spicer 44 w/ 30 Spline Axles 1975-1978 GMC K15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC K15 Indy Hauler $207.89 Details
OUT OF STOCK YP MINSGM12-30 Yukon mini spools provide the traction of a full spool at an economical cost.... Yukon Gear Mini Spool For GM 12 Bolt Car & Truck w/ 30 Spline Axles 1975-1978 GMC K15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC K15 Indy Hauler $277.89 Details
IN STOCK - DROPSHIPS YP MINSGM8.5-28 Yukon 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 GM 8.5in w/ 28 Spline Axles 1977-1977 GMC K15 Indy Hauler 1977-1978 GMC K15 Base / High Sierra / Sierra Classic $188.89 Details

Yukon Gear & Axle Spartan Lockers

IN STOCK - DROPSHIPS SL D44-30 The 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 1975-1978 GMC K15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC K15 Indy Hauler $710.89 Details
IN STOCK - DROPSHIPS SL GM12-30 USA Standard Spartan Locker For GM 12 Bolt Car & Truck w/ 30 Spline Axles 1975-1978 GMC K15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC K15 Indy Hauler $734.89 Details
IN STOCK - DROPSHIPS SL XP-D44 USA Standard Spartan Locker Replacement Cross Pin For Dana 44 1975-1978 GMC K15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC K15 Indy Hauler $56.89 Details
IN STOCK - DROPSHIPS SL XP-GM12 USA Standard Spartan Locker 12 Bolt GM Spartan Locker Cross Pin 1975-1978 GMC K15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC K15 Indy Hauler $56.89 Details

Yukon Gear & Axle Steel Spools

IN STOCK - DROPSHIPS YP FSD44-3-30DN Yukon 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 Dana 44 Steel Spool Replacement 1975-1978 GMC K15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC K15 Indy Hauler $406.89 Details

Yukon Gear & Axle USA Std Mini Spool

IN STOCK - DROPSHIPS ZP MINSD44-30 USA Standard Gear 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. Fu... USA Standard Mini Spool For Dana 44 w/ 30 Spline Axles 1975-1978 GMC K15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC K15 Indy Hauler $151.89 Details
IN STOCK - DROPSHIPS ZP MINSGM8.5-28 USA Standard Gear 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. Fu... USA Standard Mini Spool For GM 8.5in / 28 Spline 1977-1977 GMC K15 Indy Hauler 1977-1978 GMC K15 Base / High Sierra / Sierra Classic $148.89 Details

Yukon Gear & Axle USA Std Steel Spools

IN STOCK - DROPSHIPS ZP FSD44-3-30DN Installing a quality USA Standard Gear spool is a cost-effective way to get 100% lockup. Installation is easy as they install in place of your differential carrier assembly. Each USA Standard Gear spool is made from high-quality 8620 steel and heat treated for additional strength. A spool is an outs... USA Standard Steel Spool For Dana 44 w/ 30 Spline Axles / 3.73 & Down 1975-1978 GMC K15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC K15 Indy Hauler $317.89 Details
IN STOCK - DROPSHIPS ZP FSD44-4-30UP Installing a quality USA Standard Gear spool is a cost-effective way to get 100% lockup. Installation is easy as they install in place of your differential carrier assembly. Each USA Standard Gear spool is made from high-quality 8620 steel and heat treated for additional strength. A spool is an outs... USA Standard Steel Spool For Dana 44 w/ 30 Spline Axles / 3.92+ 1975-1978 GMC K15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC K15 Indy Hauler $302.89 Details