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American Axle & Manufacturing
AAM 40025925 Premium Differential Pinion Flange w/ Deflector GM
$74.80
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SKU: 40025925
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100% ORIGINAL AND QUALITY
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- Description
- Fitment
- Warranty and Refund
- Reviews
Keep your GM truck or SUV's driveline running smoothly with this American Axle & Manufacturing 40025925 Differential Pinion Flange. Built to AAM's Premium designation, this flange includes an integrated deflector to help manage contaminants near the pinion seal area, supporting long-term seal protection. Featuring a 30-spline configuration and compatibility with 1344-series U-joints, it's engineered to connect properly with the driveshaft on applications using GM 8.25-inch axles (1988-2018) and GM 9.25-inch axles (1988-2010). This part covers a broad range of GM trucks, SUVs, and AM General Hummer applications spanning 1988-2019 model years. As a new, released component from AAM—a name trusted in axle and driveline manufacturing—this flange is a straightforward way to replace a worn or damaged pinion flange without guessing on fitment specs. Always verify exact application fitment before ordering.
Notes
Pinion Flange w/ Deflector, GM 8.25-inch Axle 88-18, GM 9.25-inch Axle 88-10
Features
- Integrated deflector helps shield the pinion seal area, supporting a longer service life
- 30-spline design ensures proper driveshaft engagement for reliable power transfer
- Compatible with 1344-series U-joints for correct driveshaft connection
- Fits both GM 8.25-inch and 9.25-inch axle families across a wide model range
- Premium-grade AAM component backed by manufacturer designation for quality assurance
Application Summary
1987 Chevrolet V10 5.0L -CC 305CID V8 OHV 16 Valve Naturally Aspirated GAS1987 Chevrolet V20 4.8L -CC 292CID L6 OHV 12 Valve Naturally Aspirated GAS
1987 GMC V1500 5.0L -CC 305CID V8 OHV 16 Valve Naturally Aspirated GAS
1988 Chevrolet V20 Suburban 7.4L -CC 454CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1990, 1996, 1998 Chevrolet K2500 5.0L -CC 305CID 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
1988-1994, 1999 GMC K1500 5.0L -CC 305CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1995, 1999 Chevrolet K1500 5.0L -CC 305CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-2000 Chevrolet K3500 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1989, 1991 Chevrolet V2500 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
1991-1995 Chevrolet K2500 4.3L -CC 262CID V6 OHV 12 Valve Naturally Aspirated GAS
1992-1993 AM General Hummer 6.2L -CC 379CID V8 OHV 16 Valve Naturally Aspirated DIESEL
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
1992-1994 Chevrolet Blazer 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 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
1994 Chevrolet K1500 Suburban 6.5L -CC 395CID V8 OHV 16 Valve Turbocharged DIESEL
1994, 1997-1998 AM General Hummer 6.5L -CC 395CID V8 OHV 16 Valve Naturally Aspirated DIESEL
1994-1995 GMC Yukon 6.5L -CC 395CID V8 OHV 16 Valve Turbocharged DIESEL
1995 Chevrolet Tahoe 6.5L -CC 395CID V8 OHV 16 Valve Turbocharged DIESEL
1995 GMC K1500 6.5L -CC 395CID V8 OHV 16 Valve Naturally Aspirated DIESEL
1995-1996 AM General Hummer 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1995-1996 Chevrolet Silverado 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1996 Chevrolet K1500 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
1996-1999 Chevrolet Tahoe 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1997 GMC K1500 6.5L -CC 395CID V8 OHV 16 Valve Turbocharged DIESEL
1997, 1999-2000 Chevrolet K2500 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
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 Chevrolet Silverado 2500 5.3L 5328CC 325CID V8 OHV 16 Valve Naturally Aspirated GAS
1999 GMC Sierra 2500 5.3L 5328CC 325CID V8 OHV 16 Valve Naturally Aspirated GAS
1999-2000 Cadillac Escalade 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
1999-2001 AM General Hummer 6.5L -CC 395CID V8 OHV 16 Valve Turbocharged DIESEL
1999-2002 Chevrolet Silverado 1500 4.3L -CC 262CID V6 OHV 12 Valve Naturally Aspirated GAS
1999-2003, 2005-2006 GMC Sierra 1500 4.3L -CC 262CID V6 OHV 12 Valve Naturally Aspirated GAS
2000-2002, 2004 Chevrolet Tahoe 4.8L -CC 294CID V8 OHV 16 Valve Naturally Aspirated GAS
2000-2002, 2004-2005 GMC Yukon 4.8L -CC 294CID V8 OHV 16 Valve Naturally Aspirated GAS
2000-2003, 2005-2006, 2008 GMC Yukon XL 1500 5.3L 5328CC 325CID V8 OHV 16 Valve Naturally Aspirated GAS
2000-2003, 2005-2009 Chevrolet Suburban 2500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2000-2003, 2006, 2008-2009 Chevrolet Suburban 1500 5.3L 5328CC 325CID V8 OHV 16 Valve Naturally Aspirated GAS
2000-2004 Chevrolet Silverado 2500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2000-2004 GMC Sierra 2500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2000-2004, 2006-2009 GMC Yukon XL 2500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2001-2003, 2005-2006 Chevrolet Silverado 1500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2001-2003, 2005-2006 Chevrolet Silverado 3500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2001-2003, 2005-2006 GMC Sierra 1500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2001-2006 GMC Sierra 3500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2001-2006, 2008-2010 GMC Sierra 2500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2001-2011 Chevrolet Silverado 2500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2002-2006 Cadillac Escalade 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2002-2006 Cadillac Escalade EXT 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2002-2006 Chevrolet Avalanche 1500 5.3L 5328CC 325CID V8 OHV 16 Valve Naturally Aspirated GAS
2003, 2005-2006 Chevrolet Silverado 1500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2003, 2005-2007, 2014-2017 Chevrolet Tahoe 5.3L 5328CC 325CID V8 OHV 16 Valve Naturally Aspirated FLEX
2003, 2006-2007, 2014 GMC Yukon 5.3L 5328CC 325CID V8 OHV 16 Valve Naturally Aspirated FLEX
2003-2006 Cadillac Escalade ESV 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2004 Chevrolet Silverado 3500 6.6L 6599CC 403CID V8 OHV 32 Valve Turbocharged DIESEL
2004 Chevrolet Suburban 2500 8.1L -CC 496CID V8 OHV 16 Valve Naturally Aspirated GAS
2004 GMC Sierra 1500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2004, 2007 GMC Yukon XL 1500 5.3L 5328CC 325CID V8 OHV 16 Valve Naturally Aspirated FLEX
2004, 2007-2009 Chevrolet Silverado 1500 4.8L -CC 294CID V8 OHV 16 Valve Naturally Aspirated GAS
2004-2005, 2007 Chevrolet Suburban 1500 5.3L 5328CC 325CID V8 OHV 16 Valve Naturally Aspirated FLEX
2005 GMC Yukon XL 2500 8.1L -CC 496CID V8 OHV 16 Valve Naturally Aspirated GAS
2007 Chevrolet Silverado 1500 Classic 4.3L -CC 262CID V6 OHV 12 Valve Naturally Aspirated GAS
2007 Chevrolet Silverado 3500 5.7L -CC 350CID V8 OHV 16 Valve Naturally Aspirated GAS
2007 Chevrolet Silverado 3500 Classic 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2007 GMC Sierra 1500 HD Classic 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2007, 2010-2013 Chevrolet Avalanche 5.3L 5328CC 325CID V8 OHV 16 Valve Naturally Aspirated FLEX
2007, 2011, 2014 GMC Sierra 2500 HD 6.6L 6599CC 403CID V8 OHV 32 Valve Turbocharged DIESEL
2007-2008 Cadillac Escalade 6.2L 6162CC 376CID V8 OHV 16 Valve Naturally Aspirated GAS
2007-2008 Cadillac Escalade ESV 6.2L 6162CC 376CID V8 OHV 16 Valve Naturally Aspirated GAS
2007-2008 Cadillac Escalade EXT 6.2L 6162CC 376CID V8 OHV 16 Valve Naturally Aspirated GAS
2007-2009 GMC Sierra 1500 4.8L -CC 294CID V8 OHV 16 Valve Naturally Aspirated GAS
2007-2009, 2015-2016 GMC Sierra 5.3L 5328CC 325CID V8 OHV 16 Valve Naturally Aspirated GAS
2007-2011 Chevrolet Silverado 3500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2007-2011 GMC Sierra 3500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2008 Chevrolet Tahoe 6.2L 6162CC 376CID V8 OHV 16 Valve Naturally Aspirated GAS
2008 GMC Yukon 5.3L 5328CC 325CID V8 OHV 16 Valve Naturally Aspirated GAS
2008-2009 Chevrolet Avalanche 5.3L 5328CC 325CID V8 OHV 16 Valve Naturally Aspirated GAS
2009 Chevrolet Tahoe 5.3L 5328CC 325CID V8 OHV 16 Valve Naturally Aspirated GAS
2009-2013 Cadillac Escalade ESV 6.2L 6162CC 376CID V8 OHV 16 Valve Naturally Aspirated FLEX
2009-2013 Cadillac Escalade EXT 6.2L 6162CC 376CID V8 OHV 16 Valve Naturally Aspirated FLEX
2009-2013, 2015 GMC Yukon 6.2L 6162CC 376CID V8 OHV 16 Valve Naturally Aspirated FLEX
2009-2014 Cadillac Escalade 6.2L 6162CC 376CID V8 OHV 16 Valve Naturally Aspirated FLEX
2009-2014 GMC Yukon XL 1500 6.2L 6162CC 376CID V8 OHV 16 Valve Naturally Aspirated FLEX
2010-2013 Chevrolet Silverado 1500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated FULL HYBRID EV-FLEX (FHEV)
2010-2013 Chevrolet Suburban 2500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated FLEX
2010-2013 Chevrolet Tahoe 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated FULL HYBRID EV-FLEX (FHEV)
2010-2013 GMC Sierra 1500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated FULL HYBRID EV-FLEX (FHEV)
2010-2013 GMC Yukon XL 2500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated FLEX
2010-2013, 2017 GMC Sierra 5.3L 5328CC 325CID V8 OHV 16 Valve Naturally Aspirated FLEX
2012-2013 Chevrolet Silverado 3500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated FLEX
2012-2013 GMC Sierra 2500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated FLEX
2012-2013 GMC Sierra 3500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated FLEX
2012-2014 Chevrolet Silverado 2500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated FLEX
2014 Chevrolet Silverado 3500 HD 6.6L 6599CC 403CID V8 OHV 32 Valve Turbocharged DIESEL
2014 GMC Sierra 1500 4.3L -CC 262CID V6 OHV 12 Valve Naturally Aspirated FLEX
2014 GMC Sierra 3500 HD 6.6L 6599CC 403CID V8 OHV 32 Valve Turbocharged DIESEL
2014, 2016 Chevrolet Silverado 1500 5.3L 5328CC 325CID V8 OHV 16 Valve Naturally Aspirated FLEX
2014, 2018 GMC Sierra 6.2L 6162CC 376CID V8 OHV 16 Valve Naturally Aspirated GAS
2015 Chevrolet Silverado 1500 4.3L -CC 262CID V6 OHV 12 Valve Naturally Aspirated FLEX
2015-2017 Chevrolet Suburban 5.3L 5328CC 325CID V8 OHV 16 Valve Naturally Aspirated FLEX
2015-2017 GMC Sierra 1500 5.3L 5328CC 325CID V8 OHV 16 Valve Naturally Aspirated FLEX
2015-2018 GMC Yukon XL 6.2L 6162CC 376CID V8 OHV 16 Valve Naturally Aspirated FLEX
2017 Chevrolet Silverado 1500 6.2L 6162CC 376CID V8 OHV 16 Valve Naturally Aspirated GAS
2019 Chevrolet Silverado 1500 LD 5.3L 5328CC 325CID V8 OHV 16 Valve Naturally Aspirated FLEX
Part Numbers: 40025925
Specifications
- Brand: American Axle & Manufacturing
- Part Number: 40025925
- Part Type: Differential Pinion Flange
- GTIN: 00840382502828
- Package Dimensions: 4.5000 x 5.1250 x 4.5000 IN
- Package Weight: 2.6000 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.