1985 GMC Transmission & Drivetrain - In Stock Filter Options - Vendor In Stock Filter Options - Free Shipping on Orders Over $109 at Summit Racing

Eaton Detroit Truetrac 28 Spline Differential GM 8.5 Inch 912A556

Differential, Eaton Detroit Truetrac, 28-Spline, GM, 8.5 in., Rear, Each

Part Number: ETN-912A556

4.84 out of 5 stars ( 31 )

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Summit Racing™ Positraction 28 Spline Differential Carriers GM 8.5 Inch SUM-730966

Differential Carrier, Positraction, Nodular Iron, GM 8.5 in., 28 Spline, 2.73 Up Ratio, Each

Part Number: SUM-730966

5.0 out of 5 stars ( 4 )

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Yukon Gear & Axle Dura Grip Positraction Carriers GM 8.875 Inch (12-bolt), truck YDGGM12T-4-30-1

Differential Carrier, Dura Grip Positraction, Traction-Lok, 30-spline, Rear, GM 8.875 in. Truck, Each

Part Number: YGA-26035

3.25 out of 5 stars ( 4 )

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B&M Holeshot 2,300-2,500 Stall Torque Converter 70419

Torque Converter, Holeshot, 2,300-2,500 rpm Stall Range, Chevy, 4L60E/700R4, Each

Part Number: BMM-70419

4.67 out of 5 stars ( 3 )

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B&M Holeshot 2,900-3,200 Stall Torque Converter 20483

Torque Converter, Holeshot, 2,900-3,200 rpm Stall Range, GM, THM350/THM400, Each

Part Number: BMM-20483

5.0 out of 5 stars ( 4 )

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Yukon Gear & Axle Dura Grip Positraction Carriers GM 7.5/7.6 Inch YDGGM7.5-3-26-SM

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 )

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Centerforce Dual Friction Clutch Kits KDF240916

Clutch Kit, Dual Friction, 1.125 in. - 10-spline, Organic/Carbon Composite Disc, Pressure Plate, Chevy, GMC, Kit

Part Number: CTF-KDF240916

4.89 out of 5 stars ( 9 )

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B&M Holeshot 2,300-2,500 Stall Torque Converter 20412

Torque Converter, Holeshot, 2,300-2,500 rpm Stall Range, Chevy, THM350/THM400, Each

Part Number: BMM-20412

3.8 out of 5 stars ( 15 )

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FTI Performance ESR Series 2,800-3,200 Stall Torque Converter ESRL3082

Torque Converter, ESR Series, 9.50 in. Diameter, 2,800 to 3,000 rpm Flash Stall, 700R4, Lockup, Each

Part Number: FTI-ESRL3082

5.0 out of 5 stars ( 5 )

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Eaton Detroit Truetrac 26 Spline Differential GM 7.5 Inch 911A319

Differential, Eaton Detroit Truetrac, 26-Spline, GM, 7.5 in., 3.23 and Higher, Each

Part Number: ETN-911A319

5.0 out of 5 stars ( 10 )

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B&M Tork Master 2,800-3,200 Stall Torque Converter 20402

Torque Converter, Tork Master, 2,800-3,200 rpm Stall Range, Chevy, THM350/THM400, Each

Part Number: BMM-20402

4.2 out of 5 stars ( 5 )

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B&M Nitrous Holeshot 3,200-3,500 Stall Torque Converter 20484

Torque Converter, Nitrous Holeshot, 3,200-3,500 rpm Stall, GM, THM350/THM400, Each

Part Number: BMM-20484

5.0 out of 5 stars ( 1 )

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Richmond Gear Ring and Pinion Sets 69-0165-1 GM 8.5/8.6 in. 4.10 Gears

Gear, Ring and Pinion, 4.10:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, 3 Series, Set

Part Number: RMG-6901651

4.6 out of 5 stars ( 10 )

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FTI Performance ESR Series 3,800 Stall Torque Converter ESRL7082

TORQUE CONVERTER, GM TORQUE CONVERTER 4L60/4L60E/700R4, 30 SPLINE 3800 STALL

Part Number: FTI-ESRL7082

5.0 out of 5 stars ( 1 )

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Hurst Competition/Plus Shifters 3910002

Manual Shifter, Competition, Plus, 4-Speed, Chevy, GMC, Each

Part Number: HUU-3910002

4.75 out of 5 stars ( 4 )

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Eaton Detroit Truetrac 26 Spline Differential GM 7.5 Inch 911A415

Differential, Eaton Detroit Truetrac, 26-Spline, GM, 7.5 in., 3:08 and Down, Each

Part Number: ETN-911A415

5.0 out of 5 stars ( 4 )

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Richmond Gear Pro Gear Ring and Pinion Sets 79-0068-1 Dana 60 4.88 Gears

Gear, Ring and Pinion, 4.88:1 Ratio, Dana 60, Set

Part Number: RMG-79-0068-1

3.0 out of 5 stars ( 3 )

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B&M Nitrous Holeshot 2,300-2,500 Stall Torque Converter 20480

Torque Converter, Nitrous Holeshot, 2,300-2,500 rpm Stall Range, THM350/THM400, Each

Part Number: BMM-20480

4.0 out of 5 stars ( 12 )

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Motive Gear Ring and Pinion Sets GM10-411 GM 8.5/8.6 in. 4.11 Gears

Gear, Ring and Pinion, 4.11:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, Set

Part Number: MGR-GM10-411

5.0 out of 5 stars ( 9 )

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Yukon Gear & Axle Ring and Pinion Gear and Installation Kit Combos YGK2225 GM 8.875 in. (12-bolt) truck 3.08 Gears

Ring and Pinion Gears,Yukon Gear & Axle 8.875" GM 12 Bolt Truck, 3.08 Ratio Rear Ring & Pinion GearInstall Kit Axle Bearings & Seals

Part Number: YGA-10625

5.0 out of 5 stars ( 1 )

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B&M Holeshot 1,900-2,100 Stall Torque Converter 70417

Torque Converter, Holeshot, 1,900-2,000 rpm Stall Range, Chevy, 4L60E/700R4, Each

Part Number: BMM-70417

1.0 out of 5 stars ( 2 )

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Richmond Gear Pro Gear Ring and Pinion Sets 79-0077-1 Dana 60 4.56 Gears

Gear, Ring and Pinion, 4.56:1 Ratio, Dana 60, Set

Part Number: RMG-79-0077-1

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 18, 2026 if ordered today

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Estimated Ship Date: Mar 18, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

Richmond Gear Ring and Pinion Sets 69-0053-1 Dana 60 4.56 Gears

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FTI Performance ESR Series 2,800 Stall Torque Converter ESRL3380

Torque Converter, ESR Series, 9.50 in. Diameter, 2,800 rpm Flash Stall, 700R4, Lockup, Each

Part Number: FTI-ESRL3380

5.0 out of 5 stars ( 1 )

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Centerforce II Clutch Kits KCFT240916

CLUTCH

Part Number: CTF-KCFT240916

5.0 out of 5 stars ( 1 )

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Summit Racing™ Positraction 26 Spline Differential Carriers GM 7.5/7.6 Inch SUM-730958

Differential Carrier, Positraction, Nodular Iron, GM 7.5/7.6 in., 26 Spline, 3.23 Up Ratio, Each

Part Number: SUM-730958

4.33 out of 5 stars ( 6 )

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