Manuals
2 Step vs. 5 Step Gears 2 Step vs. 5 Step Gears  (1 KB)
Housing Spreader Housing Spreader  (1 KB)
M20 1 Piece Axle Kit Instructions M20 1 Piece Axle Kit Instructions  (1 KB)
Pinion Depth Setting Tool Pinion Depth Setting Tool  (1 KB)
Spartan Locker Installation Manual---Suzuki Samurai Spartan Locker Installation Manual---Suzuki Samurai  (1 KB)
Spartan Locker Installation Manual Spartan Locker Installation Manual  (1 KB)
Spin Free Install Manual---Dodge-1-Ton Spin Free Install Manual---Dodge-1-Ton  (3 KB)
Spin Free Install Manual---Dodge-D44 Spin Free Install Manual---Dodge-D44  (3 KB)
Spin Free Install Manual---Jeep-D30 Spin Free Install Manual---Jeep-D30  (2 KB)
Super Joint Install Manual Super Joint Install Manual  (1 KB)
Toyota Birfield Eliminator Kit Toyota Birfield Eliminator Kit  (1 KB)
USA Standard Kit Install Manual USA Standard Kit Install Manual  (3 KB)
Yukon Axle Bearing Puller Instructions Yukon Axle Bearing Puller Instructions  (1 KB)
Yukon Kit Install Manual Yukon Kit Install Manual  (3 KB)
Yukon Spindle Boring Tool Manual Yukon Spindle Boring Tool Manual  (1 KB)
Yukon Zip Locker Installation Manual Yukon Zip Locker Installation Manual  (3 KB)
General Information
Before You Call For Rearend Parts Before You Call For Rearend Parts  (4 KB)
Calibarating Spedometers Calibarating Spedometers  (3 KB)
Choosing A Differential Repair Shop Choosing A Differential Repair Shop  (4 KB)
Diagnosing Noise (Part 1) Diagnosing Noise (Part 1)  (4 KB)
Diagnosing Noise (Part 2) Diagnosing Noise (Part 2)  (3 KB)
Don't Throw Away That Model 20 Rearend Yet Don't Throw Away That Model 20 Rearend Yet  (4 KB)
Driveline Angles & Vibration Driveline Angles & Vibration  (4 KB)
Myths Regarding Differentials Myths Regarding Differentials  (4 KB)
Small Details Make A Big Difference (Part 1) Small Details Make A Big Difference (Part 1)  (4 KB)
Small Details Make A Big Difference (Part 2) Small Details Make A Big Difference (Part 2)  (4 KB)
Things To Consider In Circle Track and Road Racing Things To Consider In Circle Track and Road Racing  (6 KB)
When Is Too Much Really Too Much? When Is Too Much Really Too Much?  (4 KB)
When Just A Hammer Won't Get The Job Done When Just A Hammer Won't Get The Job Done  (4 KB)