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American Axle & Manufacturing
AAM D925355 3.55 Ratio Ring & Pinion Set for 9.25" 12 Bolt Rear Axle
$417.54
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SKU: D925355
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- Description
- Fitment
- Warranty and Refund
- Reviews
Keep your 9.25" 12 bolt rear axle running true with the American Axle & Manufacturing D925355 ring and pinion set. Engineered specifically for this axle type, this 3.55 ratio gear set includes a 39-tooth ring gear and 11-tooth pinion, paired with a 29-spline pinion and 12-bolt ring gear pattern for a precise, direct fit. Backed by ACES-verified fitment data spanning decades of Ram, Dodge, and Chrysler platforms, this set is designed to restore proper gear mesh and drivetrain performance when replacing worn or damaged components. Each set ships as a complete kit with one ring and pinion pair per application, simplifying your parts order. Whether you're rebuilding a rear differential or upgrading gear ratio, D925355 delivers the manufacturer-matched specifications needed for a proper installation on compatible 9.25" 12 bolt rear axle housings.
Features
- 3.55 gear ratio matches OE-style axle spec for consistent rear-end performance
- 39-tooth ring and 11-tooth pinion provide correct mesh for 9.25" 12 bolt axles
- 29-spline pinion ensures proper fit with compatible driveline components
- One set per application simplifies ordering with no guesswork on quantity
- Backed by a limited manufacturer warranty for added purchase confidence
Application Summary
1970-1972, 1974 Dodge D100 Pickup 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS1970-1973 Dodge Polara 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1971-1974, 1977-1978 Plymouth Fury 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1973 Dodge D100 Pickup 3.2L 3254CC 198CID L6 OHV 12 Valve Naturally Aspirated GAS
1973-1974 Dodge Challenger 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1973-1974 Plymouth Road Runner 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1973-1974, 1976-1977 Chrysler New Yorker 7.2L 7211CC 440CID V8 OHV 16 Valve Naturally Aspirated GAS
1973-1978 Chrysler Newport 5.9L -CC 360CID V8 OHV 16 Valve Naturally Aspirated GAS
1974 Dodge Charger 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1974 Dodge D300 Pickup 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1974 Dodge W300 Pickup 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1974-1975 Chrysler Imperial 7.2L 7211CC 440CID V8 OHV 16 Valve Naturally Aspirated GAS
1974-1975, 1979-1980 Dodge Ramcharger 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1974-1980 Plymouth Trailduster 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1975 Chrysler New Yorker 6.6L -CC 400CID V8 OHV 16 Valve Naturally Aspirated GAS
1975 Plymouth Fury 6.6L -CC 400CID V8 OHV 16 Valve Naturally Aspirated GAS
1975 Plymouth Road Runner 6.6L -CC 400CID V8 OHV 16 Valve Naturally Aspirated GAS
1975-1976 Dodge D300 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1975-1976 Dodge Monaco 5.9L -CC 360CID V8 OHV 16 Valve Naturally Aspirated GAS
1975-1976, 1980 Dodge D200 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1975-1977, 1979 Dodge B300 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1975-1977, 1980 Dodge B200 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1975-1978 Dodge Charger 5.9L -CC 360CID V8 OHV 16 Valve Naturally Aspirated GAS
1975-1978 Dodge W300 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1975-1979 Chrysler Cordoba 5.9L -CC 360CID V8 OHV 16 Valve Naturally Aspirated GAS
1975-1979 Dodge D100 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1975-1980 Dodge B100 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1976 Dodge Ramcharger 7.2L 7211CC 440CID V8 OHV 16 Valve Naturally Aspirated GAS
1976 Plymouth Fury 5.9L -CC 360CID V8 OHV 16 Valve Naturally Aspirated GAS
1977, 1979, 1981-1987 Dodge D150 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1977, 1980, 1983-1989 Dodge Diplomat 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1977-1978 Dodge D200 7.2L 7211CC 440CID V8 OHV 16 Valve Naturally Aspirated GAS
1977-1978 Dodge D300 7.2L 7211CC 440CID V8 OHV 16 Valve Naturally Aspirated GAS
1977-1978 Dodge Monaco 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1977-1978 Dodge Ramcharger 6.6L -CC 400CID V8 OHV 16 Valve Naturally Aspirated GAS
1978 Dodge B200 6.6L -CC 400CID V8 OHV 16 Valve Naturally Aspirated GAS
1978 Dodge B300 6.6L -CC 400CID V8 OHV 16 Valve Naturally Aspirated GAS
1978 Dodge D150 7.2L 7211CC 440CID V8 OHV 16 Valve Naturally Aspirated GAS
1978-1979 Chrysler New Yorker 5.9L -CC 360CID V8 OHV 16 Valve Naturally Aspirated GAS
1978-1979 Dodge Magnum 5.9L -CC 360CID V8 OHV 16 Valve Naturally Aspirated GAS
1978-1979, 1981-1982 Dodge Diplomat 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1979 Chrysler Newport 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1979 Dodge B200 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1979 Dodge D200 4.0L -CC 243CID L6 OHV 12 Valve Naturally Aspirated DIESEL
1979 Dodge W300 5.9L -CC 360CID V8 OHV 16 Valve Naturally Aspirated GAS
1979-1980 Dodge D300 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1980 Dodge B300 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1980 Dodge D150 5.9L -CC 360CID V8 OHV 16 Valve Naturally Aspirated GAS
1980 Dodge W300 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1980-1981 Chrysler New Yorker 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1980-1981 Chrysler Newport 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1981 Plymouth Trailduster 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1981, 1983 Dodge D350 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1981-1987 Dodge B150 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1981-1987 Dodge B250 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1981-1987 Dodge D250 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1981-1991, 1993 Dodge W250 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1981-1993 Dodge Ramcharger 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1981-1994 Dodge B350 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1982, 1984-1989 Dodge D350 5.9L -CC 360CID V8 OHV 16 Valve Naturally Aspirated GAS
1986-1987 Dodge W100 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1986-1987 Dodge W150 3.7L 3687CC 225CID L6 OHV 12 Valve Naturally Aspirated GAS
1988 Dodge W100 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1988 Dodge W150 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1991 Dodge B150 3.9L 3906CC 239CID V6 OHV 12 Valve Naturally Aspirated GAS
1988-1991 Dodge D250 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1992 Dodge D150 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1988-1994 Dodge B250 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1989 Dodge W100 3.9L 3906CC 239CID V6 OHV 12 Valve Naturally Aspirated GAS
1989 Dodge W150 3.9L 3906CC 239CID V6 OHV 12 Valve Naturally Aspirated GAS
1992 Dodge D250 5.9L -CC 360CID V8 OHV 16 Valve Naturally Aspirated GAS
1992 Dodge W250 5.9L -CC 360CID V8 OHV 16 Valve Naturally Aspirated GAS
1992-1994 Dodge B150 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1993 Dodge D150 3.9L 3906CC 239CID V6 OHV 12 Valve Naturally Aspirated GAS
1993 Dodge D250 3.9L 3906CC 239CID V6 OHV 12 Valve Naturally Aspirated GAS
1994, 1997-2000 Dodge Ram 1500 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1995-1996 Dodge Ram 1500 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated CNG
1995-1998 Dodge B2500 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1995-1998 Dodge B3500 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1997-2002 Dodge Dakota 2.5L 2507CC 153CID L4 OHV 8 Valve Naturally Aspirated GAS
1998-1999 Dodge Durango 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
1999-2003 Dodge Ram 1500 Van 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
2000-2001, 2004-2007 Dodge Durango 4.7L -CC 287CID V8 SOHC 16 Valve Naturally Aspirated GAS
2001 Dodge Ram 1500 3.9L 3906CC 239CID V6 OHV 12 Valve Naturally Aspirated GAS
2002-2003 Dodge Durango 5.9L -CC 360CID V8 OHV 16 Valve Naturally Aspirated GAS
2002-2003 Dodge Ram 1500 4.7L -CC 287CID V8 SOHC 16 Valve Naturally Aspirated GAS
2003 Dodge Dakota 4.7L -CC 287CID V8 SOHC 16 Valve Naturally Aspirated GAS
2004, 2006-2007 Dodge Ram 1500 4.7L -CC 287CID V8 SOHC 16 Valve Naturally Aspirated FLEX
2004-2010 Dodge Dakota 3.7L -CC 226CID V6 SOHC 12 Valve Naturally Aspirated GAS
2005 Dodge Ram 1500 3.7L -CC 226CID V6 SOHC 12 Valve Naturally Aspirated GAS
2007, 2009 Chrysler Aspen 5.7L -CC 345CID V8 OHV 16 Valve Naturally Aspirated GAS
2008 Chrysler Aspen 4.7L -CC 287CID V8 SOHC 16 Valve Naturally Aspirated FLEX
2008 Dodge Durango 4.7L -CC 287CID V8 SOHC 16 Valve Naturally Aspirated FLEX
2008-2010 Dodge Ram 1500 5.7L -CC 345CID V8 OHV 16 Valve Naturally Aspirated GAS
2009 Dodge Durango 5.7L -CC 345CID V8 OHV 16 Valve Naturally Aspirated GAS
2011 Dodge Durango 3.6L 3604CC 220CID V6 DOHC 24 Valve Naturally Aspirated FLEX
2011 Ram Dakota 3.7L -CC 226CID V6 SOHC 12 Valve Naturally Aspirated GAS
2011-2013, 2019, 2023-2024 Ram 1500 5.7L -CC 345CID V8 OHV 16 Valve Naturally Aspirated GAS
2014-2016, 2018 Ram 1500 3.6L 3604CC 220CID V6 DOHC 24 Valve Naturally Aspirated FLEX
2017, 2022 Ram 1500 3.0L 2987CC 182CID V6 DOHC 24 Valve Turbocharged DIESEL
2020 Ram 1500 3.6L 3604CC 220CID V6 DOHC 24 Valve Naturally Aspirated MILD HYBRID EV-GAS (MHEV)
2021 Ram 1500 5.7L -CC 345CID V8 OHV 16 Valve Naturally Aspirated MILD HYBRID EV-GAS (MHEV)
2025 Ram 1500 3.0L 2993CC 183CID L6 DOHC 24 Valve Turbocharged GAS
Part Numbers: D925355
Specifications
- Brand: American Axle & Manufacturing
- Part Number: D925355
- Part Type: Differential Ring and Pinion
- GTIN: 00840382501463
- Package Dimensions: 13.0000 x 13.0000 x 8.5000 IN
- Package Weight: 21.2000 PG
- Package Quantity: 1 EA
- Cover Bolt Quantity: 12
- Gear Ratio: 3.55
- Pinion Gear Tooth Quantity: 11
Warranty
- Warranty Type: Limited
- Warranty Duration: 1 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.