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AAM 74040441 Differential Pinion Gear Kit - GM 8.5
American Axle & Manufacturing

AAM 74040441 Differential Pinion Gear Kit - GM 8.5" Axle

$145.71 In Stock Sold out
SKU: 74040441
Categories:

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100% ORIGINAL AND QUALITY

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  • Description
  • Fitment
  • Warranty and Refund
  • Reviews

Keep your GM 8.5" differential running the way it should with the American Axle & Manufacturing 74040441 Pinion Gear Kit. Engineered specifically for the 8.5" ring gear differential used across a wide range of Buick, Cadillac, and Chevrolet trucks and full-size cars built between 1988 and 1999, this kit is designed to restore proper spider and pinion gear function inside your axle assembly. AAM backs this component with its Premium attribute designation, reflecting a build quality intended for durable, reliable service. The kit ships complete and ready to install, with a 10-bolt cover configuration matching the correct GM 8.5" housing. Whether you're rebuilding a Suburban, Blazer, Fleetwood, or Roadmaster differential, this pinion gear kit is matched to your application through verified fitment data covering 150 vehicle configurations, helping you get the right part the first time.

Features

  • Purpose-built for GM 8.5" differentials, helping ensure correct fit versus generic gear kits
  • Premium attribute designation from AAM signals a build intended for dependable long-term service
  • 10-bolt cover compatibility matches the correct GM 8.5" housing configuration
  • Verified fitment across 150 listed applications reduces guesswork when ordering
  • Ships as a complete kit with quantity of one per application for straightforward ordering

Application Summary

1980-1990 Oldsmobile Custom Cruiser 5.0L -CC 307CID V8 OHV 16 Valve Naturally Aspirated GAS
1983-1984 Chevrolet S10 Blazer 2.0L -CC 122CID L4 OHV 8 Valve Naturally Aspirated GAS
1985-1988 Chevrolet S10 Blazer 2.5L 2474CC 151CID L4 OHV 8 Valve Naturally Aspirated GAS
1988 Chevrolet R10 Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1988 Chevrolet R20 Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1988 Chevrolet V10 Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1988 Chevrolet V20 Suburban 7.4L -CC 454CID V8 OHV 16 Valve Naturally Aspirated GAS
1988, 1991-1994 Chevrolet Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1989, 1994-1995, 1999 Chevrolet C1500 5.0L -CC 305CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1990 Buick Electra 3.8L 3800CC 231CID V6 OHV 12 Valve Naturally Aspirated GAS
1988-1990 Cadillac Brougham 5.0L -CC 307CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1990 Cadillac Fleetwood 4.5L -CC 273CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1990 Chevrolet K2500 5.0L -CC 305CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1990, 1996-1999 Chevrolet C2500 5.0L -CC 305CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1991 GMC Jimmy 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1991 GMC R1500 Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1991 GMC R2500 Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1991 GMC V1500 Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1991 GMC V2500 Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1992 Chevrolet Caprice 5.0L -CC 305CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1994 Chevrolet Blazer 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1994 GMC C1500 5.0L -CC 305CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1994, 1999 GMC K1500 5.0L -CC 305CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1995 Chevrolet G10 5.0L -CC 305CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1995 Chevrolet G20 5.0L -CC 305CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1995 Chevrolet K1500 5.0L -CC 305CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1995 GMC G1500 5.0L -CC 305CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1995 GMC G2500 5.0L -CC 305CID V8 OHV 16 Valve Naturally Aspirated GAS
1989 Chevrolet S10 Blazer 2.8L -CC 173CID V6 OHV 12 Valve Naturally Aspirated GAS
1989, 1991 Chevrolet V2500 Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1989-1990 Chevrolet Suburban 5.7L -CC -CID V8 U/K U/K Valve Naturally Aspirated GAS
1989-1991 Chevrolet R1500 Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1989-1991 Chevrolet R2500 Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1989-1991 Chevrolet V1500 Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1990 Chevrolet V2500 Suburban 7.4L -CC 454CID V8 OHV 16 Valve Naturally Aspirated GAS
1990-1993 Chevrolet C1500 7.4L -CC 454CID V8 OHV 16 Valve Naturally Aspirated GAS
1990-1994 Chevrolet S10 Blazer 4.3L -CC 262CID V6 OHV 12 Valve Naturally Aspirated GAS
1991 Buick Commercial Chassis 5.0L -CC 305CID V8 OHV 16 Valve Naturally Aspirated GAS
1991 Buick Roadmaster 5.0L -CC 305CID V8 OHV 16 Valve Naturally Aspirated GAS
1991 Chevrolet K2500 4.3L -CC 262CID V6 OHV 12 Valve Naturally Aspirated GAS
1991 Oldsmobile Custom Cruiser 5.0L -CC 305CID V8 OHV 16 Valve Naturally Aspirated GAS
1991-1992 Cadillac Brougham 5.0L -CC 305CID V8 OHV 16 Valve Naturally Aspirated GAS
1991-1992 Cadillac Fleetwood 4.9L -CC 300CID V8 OHV 16 Valve Naturally Aspirated GAS
1991-1992, 1994-1995 Chevrolet C2500 4.3L -CC 262CID V6 OHV 12 Valve Naturally Aspirated GAS
1992 Oldsmobile Custom Cruiser 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1992-1993 GMC Typhoon 4.3L -CC 262CID V6 OHV 12 Valve Turbocharged GAS
1992-1993, 1995-1999 Chevrolet C1500 Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1992-1993, 1995-1999 Chevrolet K1500 Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1992-1993, 1996-1999 GMC Yukon 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1992-1996 Buick Commercial Chassis 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1992-1996 Buick Roadmaster 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1992-1999 Chevrolet C2500 Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1992-1999 Chevrolet K2500 Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1992-1999 GMC C1500 Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1992-1999 GMC C2500 Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1992-1999 GMC Jimmy 4.3L -CC 262CID V6 OHV 12 Valve Naturally Aspirated GAS
1992-1999 GMC K1500 Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1992-1999 GMC K2500 Suburban 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1993 Chevrolet C2500 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated CNG
1993, 1995-1996 Chevrolet Caprice 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1993-1996 Cadillac Fleetwood 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1994 Chevrolet C1500 Suburban 6.5L -CC 395CID V8 OHV 16 Valve Turbocharged DIESEL
1994 Chevrolet Caprice 4.3L -CC 265CID V8 OHV 16 Valve Naturally Aspirated GAS
1994 Chevrolet K1500 Suburban 6.5L -CC 395CID V8 OHV 16 Valve Turbocharged DIESEL
1994-1995 GMC Yukon 6.5L -CC 395CID V8 OHV 16 Valve Turbocharged DIESEL
1994-1995, 1999 Chevrolet S10 2.2L 2190CC 134CID L4 OHV 8 Valve Naturally Aspirated GAS
1994-1996 Chevrolet Impala 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1994-1999 GMC Sonoma 2.2L 2190CC 134CID L4 OHV 8 Valve Naturally Aspirated GAS
1995 GMC C1500 6.5L -CC 395CID V8 OHV 16 Valve Naturally Aspirated DIESEL
1995 GMC K1500 6.5L -CC 395CID V8 OHV 16 Valve Naturally Aspirated DIESEL
1995-1996 Chevrolet Silverado 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1995-1998 Chevrolet Suburban 1500 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1995-1999 Chevrolet Blazer 4.3L -CC 262CID V6 OHV 12 Valve Naturally Aspirated GAS
1996 Chevrolet C1500 4.3L -CC 262CID V6 OHV 12 Valve Naturally Aspirated GAS
1996 Chevrolet K1500 4.3L -CC 262CID V6 OHV 12 Valve Naturally Aspirated GAS
1996, 1998 GMC C1500 4.3L -CC 262CID V6 OHV 12 Valve Naturally Aspirated GAS
1996, 1998 GMC K1500 4.3L -CC 262CID V6 OHV 12 Valve Naturally Aspirated GAS
1996-1998 Chevrolet S10 4.3L -CC 262CID V6 OHV 12 Valve Naturally Aspirated GAS
1996-1999 Chevrolet Express 1500 4.3L -CC 262CID V6 OHV 12 Valve Naturally Aspirated GAS
1996-1999 GMC Savana 1500 4.3L -CC 262CID V6 OHV 12 Valve Naturally Aspirated GAS
1997 GMC C1500 6.5L -CC 395CID V8 OHV 16 Valve Turbocharged DIESEL
1997 GMC K1500 6.5L -CC 395CID V8 OHV 16 Valve Turbocharged DIESEL
1997-1998 Chevrolet C1500 6.5L -CC 395CID V8 OHV 16 Valve Turbocharged DIESEL
1997-1998 Chevrolet K1500 6.5L -CC 395CID V8 OHV 16 Valve Turbocharged DIESEL
1997-1999 Chevrolet Silverado 4.0L 3990CC 243CID L4 OHV 8 Valve Naturally Aspirated DIESEL
1999 Cadillac Escalade 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1999 Chevrolet Silverado 1500 4.3L -CC 262CID V6 OHV 12 Valve Naturally Aspirated GAS
Part Numbers: 74040441

Specifications

  • Brand: American Axle & Manufacturing
  • Part Number: 74040441
  • Part Type: Differential Spider and Pinion Gear Kit
  • GTIN: 00840382504631
  • Package Dimensions: 4.7500 x 4.7500 x 4.2500 IN
  • Package Weight: 4.4500 PG
  • Package Quantity: 1 EA
  • Grade Type: Premium

Warranty

  • Warranty Type: Limited
  • Warranty Duration: 1X Years
  • Warranty Description: Limited, see demandaam.com

Returns

30-Day Money-Back Guarantee

We want you to be completely satisfied with your purchase! If you are not happy for any reason, you may return the item within 30 days for a refund, minus shipping fees, provided that: The part is brand new, uninstalled, and undamaged in any way.

To initiate a return, please contact us or email support@mizumoauto.com for a Return Authorization Number (RMA) and the return shipping address. Returns without an RMA number will be refused and returned to you at your expense.

Return Requirements:

  • Items must be securely packed in the original manufacturer's packaging.
  • All original materials must be included, such as hardware, manuals, protective caps, wrapping, and instructions.
  • You must obtain and retain the tracking number for your return.

Non-Returnable Items:

  • Piston rings, main bearings, and rod bearings are non-returnable if the manufacturer’s seal or shrink-wrapped plastic has been opened. No exceptions—this ensures the integrity of the parts you receive.

We are not responsible for lost or damaged returns. If your return is lost or damaged during shipping, a refund cannot be issued, as the item cannot be resold or returned to the supplier. Please file a claim directly with your shipping carrier for reimbursement.

Refunds are processed within 1-2 business days after we receive and inspect the returned item. Please allow this processing time before inquiring about your refund status.

 

Warranty

Mizumo Auto provides a 90-day Limited Warranty against defects in workmanship and materials under normal service conditions, effective from the original delivery date.

This warranty is non-transferable and applies only to the original purchaser. Coverage is limited to the replacement or refund of defective products.

Exclusions:

The warranty does not cover labor costs, damage resulting from accidents, misuse, alterations, or unauthorized modifications, as well as additional expenses such as towing, fluids, oils, car rentals, and any other parts not included in the original purchase.

Warranty Claims Process:

  • All warranty claims must be pre-authorized and returned prepaid to Mizumo Auto for inspection and approval.
  • No exchanges will be made for products that have been damaged, misused, or improperly installed. We strongly recommend professional installation.
  • The buyer assumes all risk of damage resulting from improper installation.

All disputes related to transactions shall be resolved by a court of competent jurisdiction in Los Angeles County, California.

 

Shipping

We offer Free UPS Ground or USPS Ground Advantage shipping within the continental U.S. (48 states).

Shipping to Other Locations:

A delivery surcharge applies to shipments to: Alaska, Hawaii, Puerto Rico, U.S. territories, APO/FPO addresses, Canada, and international destinations.

Order Processing & Tracking:

  • Orders are shipped Monday through Friday, excluding holidays.
  • Orders placed before 3:00 PM PST will ship the same day, unless unexpected delays occur.
  • A tracking number will be emailed within one business day after shipping.

If you do not receive a tracking number, please:

  • Check your spam/junk folder.
  • If it's not there, contact us via phone or eBay message for assistance.

International Orders:

Import duties, taxes, and brokerage fees are not included in the shipping fee. Please check with your shipping carrier and local customs office regarding any applicable fees before placing your order.

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