This is one GM 10 bolt 8.6 Gear Set 4.56 Ratio Ring and Pinion.

1999 & UP CHEVROLET & GMC 1-2 TON

PICK UP TRUCKS, Vans and Full Size SUV’s

1999 & UP Silverado

1999 & UP Suburban

1999 & UP Tahoe

1999 & UP Express

1999 & UP Sierra

1999 & UP Yukon

1999 & UP Savana

WILL ALSO FIT:

1977 - 91 BLAZER FRONT DIFFERENTIAL & REAR DIFFERENTIAL

1978 - 99-1/2 C10 / C15 / G10 / G15

1979 - 99-1/2 K10 / K15 / K20 / K25 FRONT DIFFERENTIAL

1982 - 99-1/2 K10 / K15 REAR DIFFERENTIAL

Yokes

U-joints

Drive shaft parts

Spider (nest) gear kits

Empty Diff. cases

Lockers

Posi units

Spools

PTO's

Shim kits

Ring Gear Bolts

Pre Load Spacers

Pinion Nuts

Install kits

Master Overhaul kits

Rear Inspection Covers

Complete Third member

Bearings

Seals

SPECIFICATIONS:

GM8.5-456 G885456 GM10-456

41-9 TOOTH COUNT

10 7/16 X 20 LH BOLTS

PINION DIA 1.626" 30 SPLINE

CASES 2.56 & NUMERICALLY LOWER

2.73 & NUMERICALLY HIGHER