Brand: Motive Gear
K30 1979-87 D60F/GM10.5R 4.88X
UPC: 00698231099186
App/Model: Dana 60 Standard|GM 10.5
Cover Bolt Quantity: 10 Front (D60-488)|14 Rear (GM10.5-488X)
Differential Carrier Break: 4.56 Ratio and Higher Front (D60-488)|4.10 Ratio and Lower Rear (GM10.5-488X)
Differential Model: Dana 60 Standard|GM 10.5
Gear Ratio: 4.88
Pinion Gear Tooth Quantity: 8
Pinion Shaft Diameter: 1.626 Front (D60-488)|1.75 Rear (GM10.5-488X) Inch
Pinion Spline Count: 29 Front (D60-488)|30 Rear (GM10.5-488X)
Prop 65 Yes/No: No
Ring Gear Bolt Quantity: 12
Ring Gear Material: 8620 Steel
Ring Gear Outside Diameter: 9.75 Front (D60-488)|10.5 Rear (GM10.5-488X) Inch
Ring Gear Rotation: Standard
Ring Gear Tooth Quantity: 39
Taxonomy A: LD Differential
Taxonomy B: Ring and Pinion Gear Packages
Taxonomy C: Front and Rear
Taxonomy D: 4.88
For Dana 60 and GM 10.5″ – Ring and Pinions Including Timken Bearing Kits; 4.88 Ratio; Requires 4.56 and Higher Front Carrier; Requires 4.10 and Lower Rear Carrier

Installation Instructions
Installation Instructions
Installation Instructions
Installation Instructions
Installation Instructions
Installation Instructions

Warranty Period: 1 Year or 50,000 Miles

Replaces:

• Revolution Gear & Axle: REV-GM14T/D60-488T-K
• Yukon Gear and Axle: YGK021

Applications:

• 1977-1986 Chevrolet K30
• 1987-1987 Chevrolet V30
• 1977-1978 GMC K35
• 1979-1986 GMC K3500
• 1987-1987 GMC V3500