800-720-0950
For use with Chrysler & AAM Axles
RING & PINION GEAR SETS

Sierra Gear & Axle has a complete inventory of Ring & Pinion Gear Sets for Dodge RAM and Chrysler axles.

Our Ring and Pinion sets are reasonably priced and are the highest quality aftermarket gear sets available. Ring and Pinion Gear Sets from Sierra Gear are engineered and manufactured for easy setup, quiet operation and long life.

Our Ring & Pinion Gear Sets for Dodge, RAM and Chrysler include lots of ratios and include gears for passenger cars, trucks, van and 4×4 vehicles. Some of the later model Dodge and RAM trucks used axles manufactured by American Axle & Manufacturing (AAM). We have gears for those too!

Complete your differential ratio change, rebuild, repair or overhaul with one of our Differential Repair and Installation Kits.

Not sure which ring and pinion gear ratio you want? Use our Differential Gear Ratio Calculator or call one of our technical experts for advice.

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Application Chart:

Ring and Pinion Gear Sets for use with Chrysler Differentials

Ring and Pinion Gear Catalog

CHRYSLER AXLES – Ring and Pinion Gear Sets
7.25″ Chrysler Ring & Pinion Sierra Gear & Axle Part #
7.25″ Chrysler – 4.10 Ratio R&P SG C7.25-411
8″ Chrysler IFS Ring & Pinion Sierra Gear & Axle Part #
8″ Chrysler IFS – 3.91 Ratio R&P SG C8-391
8″ Chrysler IFS – 4.10 Ratio R&P SG C8-411
8″ Chrysler IFS – 4.56 Ratio R&P SG C8-456
8.25″ Chrysler Ring & Pinion Sierra Gear & Axle Part #
8.25″ Chrysler – 2.71 Ratio R&P SG C8.25-271
8.25″ Chrysler – 3.08 Ratio R&P Double Drilled for Early/Late SG C8.25-308D
8.25″ Chrysler – 3.21 Ratio R&P SG C8.25-321
8.25″ Chrysler – 3.55 Ratio R&P Double Drilled for Early/Late SG C8.25-355D
8.25″ Chrysler – 3.73 Ratio R&P Double Drilled for Early/Late SG C8.25-373D
8.25″ Chrysler – 3.90 Ratio R&P Double Drilled for Early/Late SG C8.25-390D
8.25″ Chrysler – 4.11 Ratio R&P Double Drilled for Early/Late SG C8.25-411D
8.25″ Chrysler – 4.56 Ratio R&P Double Drilled for Early/Late SG C8.25-456D
8.25″ Chrysler – 4.88 Ratio R&P Double Drilled for Early/Late SG C8.25-488D
8.25″ Chrysler – 5.13 Ratio R&P Double Drilled for Early/Late SG C8.25-5.13D
8.75″ Chrysler Ring & Pinion Sierra Gear & Axle Part #
8.75″ Chrysler – 3.55 Ratio R&P 741 Case – Fine Thread SG C8.75-355-41 FINE
8.75″ Chrysler – 3.73 Ratio R&P 741 Case – Fine Thread SG C8.75-373-41 FINE
8.75″ Chrysler – 3.23 Ratio R&P 742 Case – Coarse Thread SG C8.75-323-42 COARSE
8.75″ Chrysler – 3.55 Ratio R&P 742 Case – Coarse Thread SG C8.75-355-42 COARSE
8.75″ Chrysler – 3.73 Ratio R&P 742 Case – Coarse Thread SG C8.75-373-42 COARSE
8.75″ Chrysler – 3.91 Ratio R&P 742 Case – Coarse Thread SG C8.75-390-42 COARSE
8.75″ Chrysler – 4.11 Ratio R&P 742 Case – Coarse Thread SG C8.75-411-42 COARSE
8.75″ Chrysler – 4.56 Ratio R&P 742 Case – Coarse Thread SG C8.75-456-42 COARSE
8.75″ Chrysler – 3.23 Ratio R&P 489 Case – Fine Thread SG C8.75-323-89 FINE
8.75″ Chrysler – 3.55 Ratio R&P 489 Case – Fine Thread SG C8.75-355-89 FINE
8.75″ Chrysler – 3.73 Ratio R&P 489 Case – Fine Thread SG C8.75-373-89 FINE
8.75″ Chrysler – 3.90 Ratio R&P 489 Case – Fine Thread SG C8.75-390-89 FINE
8.75″ Chrysler – 4.10 Ratio R&P 489 Case – Fine Thread SG C8.75-411-89 FINE
8.75″ Chrysler – 4.56 Ratio R&P 489 Case – Fine Thread SG C8.75-456-89 FINE
9.25″ Rear Chrysler Ring & Pinion Sierra Gear & Axle Part #
9.25″ Chrysler – 3.21 Ratio R&P SG C9.25-321
9.25″ Chrysler – 3.55 Ratio R&P (Noisy) SG C9.25-355
9.25″ Chrysler – 3.55 Ratio R&P Premium 2-Cut SGPC9.25-355
9.25″ Chrysler – 3.55 Ratio R&P Premium Dry-Cut Double Drilled including ’14 & Up SGPC9.25-355DCD
9.25″ Chrysler – 3.92 Ratio R&P 47 x 12 SG C9.25-390
9.25″ Chrysler – 3.92 Ratio R&P Premium 2-Cut SGPC9.25-390
9.25″ Chrysler – 3.92 Ratio R&P Double Drilled 2011 & Up SG C9.25-390B
9.25″ Chrysler – 3.91 Ratio R&P Premium Dry-Cut Double Drilled 2011 & Up SGPC9.25-390DCD
9.25″ Chrysler – 4.10 Ratio R&P SG C9.25-411
9.25″ Chrysler – 4.10 Ratio R&P Premium Dry-Cut Double Drilled SGPC9.25-411DCD
9.25″ Chrysler – 4.56 Ratio R&P (NOISY) SG C9.25-456
9.25″ Chrysler – 4.56 Ratio R&P Double Drilled for ZF SG C9.25-456D
9.25″ Chrysler – 4.88 Ratio R&P Double-Drilled for ZF SG C9.25-488D
9.25″ Front Chrysler Ring & Pinion Sierra Gear & Axle Part #
9.25″ Chrysler – 3.42 Ratio R&P Reverse SG C9.25-342R
9.25″ Chrysler – 3.73 Ratio R&P Reverse SG C9.25-373R
9.25″ Chrysler – 4.11 Ratio R&P ’02+ IFS Reverse SG C9.25-411R
9.25″ Chrysler – 4.30 Ratio R&P Reverse SG C9.25-430R
9.25″ Chrysler – 4.56 Ratio R&P ’02+ IFS Reverse SG C9.25-456R
11.5″ Chrysler (AAM) Ring & Pinion Sierra Gear & Axle Part #
11.5″ Chrysler (Dodge RAM) & GM – 3.42 Ratio R&P SG GM11.5-342
11.5″ Chrysler (Dodge RAM) & GM – 3.73 Ratio R&P SG GM11.5-373
11.5″ Chrysler (Dodge RAM) & GM – 4.10 Ratio R&P SG GM11.5-411
11.5″ Chrysler (Dodge RAM) & GM – 4.56 Ratio R&P SG GM11.5-456
11.5″ Chrysler (Dodge RAM) & GM – 4.88 Ratio R&P SG GM11.5-488
11.5″ Chrysler (Dodge RAM) & GM – 5.13 Ratio R&P SG GM11.5-513
11.5″ Chrysler (Dodge RAM) & GM – 5.38 Ratio R&P SG GM11.5-538
11.8″ Chrysler (AAM) Ring & Pinion Sierra Gear & Axle Part #
11.8″ Chrysler / Dodge RAM 3500 – 3.42 Ratio R&P SG C11.8-342
11.8″ Chrysler / Dodge RAM 3500 – 3.73 Ratio R&P SG C11.8-373
11.8″ Chrysler / Dodge RAM 3500 – 4.11 Ratio R&P SG C11.8-411
11.8″ Chrysler / Dodge RAM 3500 – 4.30 Ratio R&P SG C11.8-430
11.8″ Chrysler / Dodge RAM 3500 – 4.56 Ratio R&P SG C11.8-456
11.8″ Chrysler / Dodge RAM 3500 – 4.88 Ratio R&P SG C11.8-488
11.8″ Chrysler / Dodge RAM 3500 – 5.13 Ratio R&P SG C11.8-513
11.8″ Chrysler / Dodge RAM 3500 – 5.38 Ratio R&P SG C11.8-538

 

Many of the axles used in Dodge and RAM trucks were manufactured by AAM. For an application chart showing what was used and where, click HERE

ISOTROPIC SUPERFINISHING

Any of our Ring & Pinion gears can be ordered “polished” using our in-house Isotropic Superfinishing process.

Simply put, Isotropic Superfinishing significantly reduces the surface imperfections that remain after a Ring and Pinion Gear set is manufactured. The result is a cooler, quieter and longer lasting gear set. At West Coast Differentials, the process we use is chemically accelerated vibratory surface finishing. This is technically not a polishing process, however the resulting finish does have a polished appearance. This process eliminates surface imperfections without removing material or changing the physical dimensions of the part.
This finishing process is widely used in racing applications where a conventional break-in process is not feasible, and where optimum performance is not an option.

BENEFITS of ISOTROPIC SUPERFINISHING

  • Reduced Friction
  • Reduced Contact Wear
  • Reduced Heat
  • Increased Durability
  • Improved Oil Retention
  • Lower Operating Temperature
  • Reduced Noise & Vibration
  • Increased Fuel Economy
  • Reduced Break-In Requirements
  • Reduced Maintenance

For lead time and pricing, please call Sierra Gear & Axle directly at (800) 792-2714

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