GM 8.5" Chevy 10 Bolt Rearend Yukon Duragrip Posi LSD Differential YDGGM8.5-3-28. Get longer life and better traction with the heavy duty Yukon Dura Grip Positraction 0805 Smd DIY GM 8.5 Chevy 10 Bolt Yukon Duragrip Posi LSD 30 Spline GM 8.5 10 Bolt Yukon Duragrip Posi 30 Spline Differential Placement on Vehicle: Rear, Brand: Yukon Gear, Items Included: Carrier Manufacturer Part Number: YDGGM8., 5-3-30, CK GM8., 5-HD, 10x-YSPBLT-019, OILADD