1985 Differential & Rear-End Components

Gear, Ring and Pinion, EXCel, 3.73:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, Set

Part Number: RMG-GM85373

4.17 out of 5 stars ( 12 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Dura Grip Positraction Carrier, Traction-Loc, GM 7.5/7.6 in., 26 Spline, 3.23 Up Ratio, Each

Part Number: YGA-26017

4.4 out of 5 stars ( 5 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Differential, Eaton Detroit Truetrac, 33-Spline, GM, 14-Bolt, 9.5 in., Each

Part Number: ETN-914A538

4.44 out of 5 stars ( 9 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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• $75 Summit Bucks

Ring and Pinion Gears, 3.42:1 Ratio, 30-spline, Standard Rotation, GM 8.5 in., GM 8.6 in., Set

Part Number: MGR-GM10-342A

4.5 out of 5 stars ( 16 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Gear, Ring and Pinion, 3.73:1 Ratio, 1.625 in. Pinion, 30-Spline, GM 8.5/8.6 in., Set

Part Number: YGA-24158

4.1 out of 5 stars ( 10 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Gear, Ring and Pinion, 3.55:1 Ratio, Ford, 8.8 in., Set

Part Number: FMS-M-4209-88355

4.8 out of 5 stars ( 25 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Differential Covers, Differential Cover Kits, Dana 44, 10-bolt, Nodular Iron, Silver Hammertone Powdercoated, Bolts, Gaskets, Kit

Part Number: SDH-10023536

4.95 out of 5 stars ( 22 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Ring and Pinion Gears, GM 7.5/7.625 in., 4.10:1 Ratio, 27-spline, Standard Rotation, Buick, Cadillac, Chevy, GMC, Hummer, Isuzu, Olds, Pontiac, Set

Part Number: MGR-GM7-5-410A

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Differential Carrier, Dura Grip, Limited Slip, Steel, Rear, Chrysler 9.25 in., Each

Part Number: YGA-26019

4.4 out of 5 stars ( 5 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Clutch Kit, Street-Strip Performance, 1-1/8 in. Shaft, 10-Spline, 11 in. Organic/Ceramic Disc, GM, Kit

Part Number: SUM-700932

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Ring and Pinion Installation Kit, Master Kit, Ford, 8.8 in., Kit

Part Number: MGR-R8-8RMK

4.0 out of 5 stars ( 10 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

Locking Hubs, Manual, Supreme, Chrome, Jeep, International, Pair

Part Number: MMK-457

4.45 out of 5 stars ( 11 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Differential, Electric Locker, 30-Spline, Dana 44, 3.92 and Numerically Higher Ratios, Each

Part Number: ETN-19969-010

4.25 out of 5 stars ( 4 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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• $150 Summit Bucks

Differential, Detroit Truetrac, 29-Spline, Hummer/AMC 20 IRS, 3.08:1 + Higher, Each

Part Number: ETN-912A579

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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• $75 Summit Bucks

Ring and Pinion Gears and Differential Combo, GM 8.5 in., 3.73:1, 30-spline Pinion, 28-spline Axle, Rear, Buick, Chevy, Oldsmobile, Pontiac, Kit

Part Number: YGA-12628

Not Yet Reviewed

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Differential Cover, Aluminum, Black, Perfect Launch Logo, GM, 7.50 in., 10-Bolt, Each

Part Number: PRO-66667

4.58 out of 5 stars ( 33 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Ring and Pinion Gear Installation Kit, Master Overhaul, 30 Spline, GM 8.5 in., Kit

Part Number: YGA-14088

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Locking Hubs, Manual, Supreme, Stainless Steel, Polished, Chevy, Dodge, Ford, GMC, Jeep, Plymouth, Pair

Part Number: MMK-104

4.76 out of 5 stars ( 58 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Dura Grip Positraction Carrier, Traction-Loc, Ford 8.8 in., 31 Spline, Each

Part Number: YGA-26006

3.75 out of 5 stars ( 8 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Gear, Ring and Pinion, 4.10:1 Ratio, GM, 10.5 in., 14-Bolt, Fits 4.10:1 and Numerically Lower Carrier, Set

Part Number: MGR-GM10-5-410

4.86 out of 5 stars ( 7 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Differential, Eaton Detroit Truetrac, Limited Slip, 28-Spline, Ford, 9 in., Each

Part Number: ETN-912A587

5.0 out of 5 stars ( 8 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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• $75 Summit Bucks

Differential, Eaton Detroit Truetrac, 27-Spline, Dana 35, Jeep, Each

Part Number: ETN-912A569

4.64 out of 5 stars ( 11 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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• $75 Summit Bucks

Ring and Pinion Gears, EXCel, 4.10:1 Ratio, 30-spline, Standard Rotation, GM 8.5 in., GM 8.6 in., Set

Part Number: RMG-GM85410

4.0 out of 5 stars ( 8 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Gear, Ring and Pinion, 4.11:1 Ratio, Ford, 9 in., Set

Part Number: RMG-79-0045-1

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Differential Cover, Aluminum, Natural, GM, 12-Bolt 8.875 in., Truck, Kit

Part Number: SUM-730503N

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air