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American Axle & Manufacturing
AAM 40189030 Pinion Flange Seal - GM 11.5" Axle 2020-25 HD Trucks
$42.22
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SKU: 40189030
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100% ORIGINAL AND QUALITY
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- Description
- Fitment
- Warranty and Refund
- Reviews
Keep your GM 11.5-inch rear axle sealed and protected with the American Axle & Manufacturing 40189030 pinion flange seal. Engineered specifically for 2020-2025 Chevrolet Silverado 2500 HD/3500 HD and GMC Sierra 2500 HD/3500 HD trucks equipped with the 6.6L L8T gas or 6.6L L5P Duramax diesel engines, this seal is built to the exact specification needed for a proper fit at the pinion flange. As a new component from AAM, a name trusted in driveline manufacturing, this seal helps maintain gear oil containment and keep contaminants out of your differential housing. Sold individually (one required per application), it's a straightforward, targeted replacement part for heavy-duty truck owners tackling axle service or preventive maintenance. Confirm your exact year, make, model, and engine combination before ordering to ensure correct fitment for your specific axle setup.
Features
- Purpose-built for GM 11.5-inch axle housings, helping ensure a precise, reliable seal fit
- Covers 2020-2025 Silverado and Sierra 2500HD/3500HD with L8T or L5P engines
- New AAM component supports proper pinion flange sealing to help contain gear oil
- Compact, single-unit packaging simplifies ordering exactly what your repair requires
- Backed by AAM's driveline manufacturing experience for demanding heavy-duty truck use
Application Summary
2020, 2023-2024 Chevrolet Silverado 3500 HD 6.6L 6599CC 403CID V8 OHV 32 Valve Turbocharged DIESEL2020, 2023-2024 GMC Sierra 2500 HD 6.6L 6599CC 403CID V8 OHV 32 Valve Turbocharged DIESEL
2020, 2023-2024 GMC Sierra 3500 HD 6.6L 6599CC 403CID V8 OHV 32 Valve Turbocharged DIESEL
2021-2022, 2025 Chevrolet Silverado 3500 HD 6.6L 6571CC 401CID V8 OHV 16 Valve Naturally Aspirated GAS
2021-2022, 2025 GMC Sierra 2500 HD 6.6L 6571CC 401CID V8 OHV 16 Valve Naturally Aspirated GAS
2021-2022, 2025 GMC Sierra 3500 HD 6.6L 6571CC 401CID V8 OHV 16 Valve Naturally Aspirated GAS
2022, 2025 Chevrolet Silverado 2500 HD 6.6L 6571CC 401CID V8 OHV 16 Valve Naturally Aspirated GAS
2023-2024 Chevrolet Silverado 2500 HD 6.6L 6599CC 403CID V8 OHV 32 Valve Turbocharged DIESEL
Part Numbers: 40189030
Specifications
- Brand: American Axle & Manufacturing
- Part Number: 40189030
- Part Type: Differential Pinion Seal
- GTIN: 00840382503009
- Package Dimensions: 4.0000 x 4.0000 x 1.5000 IN
- Package Weight: 0.2000 PG
- Package Quantity: 1 EA
- Shaft Diameter: 66.3
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.