Pioneer Cables FRG-139A Automatic Transmission Ring Gear

Automatic Transmission Ring Gear for OE-Style Cranking

The Pioneer Cables FRG-139A automatic transmission ring gear is built for applications where starter engagement has worn or damaged the original ring gear teeth. With 139 teeth, a 10.823-inch inside diameter, 11.767-inch outside diameter, and 0.331-inch thickness, it matches the dimensional requirements needed for proper starter engagement and reliable engine cranking.

Compatible with select Dodge Dart, Dodge Aries, Plymouth Reliant, and Plymouth TC3 applications, this ring gear is a direct-fit replacement for vehicles that need accurate tooth count and consistent fitment. The FRG-139A is made to match original part function for dependable service in automatic transmission hard part repairs.

Key Features

• Automatic transmission ring gear for starter engagement
• 139-tooth design for the specified OE-style application
• Inside diameter: 10.823 inches
• Outside diameter: 11.767 inches
• Thickness: 0.331 inches
• Direct replacement format for select Chrysler-era compact car applications
• Part number: FRG-139A

Detailed Description

The Pioneer Cables FRG-139A ring gear is used where the starter motor engages the flywheel or flexplate ring gear to crank the engine. When teeth become worn, chipped, or broken from repeated starter contact, the engine may not turn over correctly. This replacement ring gear restores the tooth profile and dimensions needed for proper starter mesh and dependable operation. This part cross-references NGK 4482 for the same application.

Fits 1982-1989 Dodge Dart, N/A. Fits 1981-1982 Dodge Aries, N/A. Fits 1981-1982 Plymouth Reliant, N/A. Fits 1981 Plymouth TC3, N/A. The FRG-139A is also identified by interchange references including 139A, 5222789, 6003074, CC139A, RG33, and XG33.

What It Helps Fix

• Engine cranking problems caused by worn ring gear teeth
• Starter motor slipping or failing to engage
• Grinding noise during engine start-up
• Broken or chipped ring gear teeth from repeated use
• Starting issues related to incorrect ring gear tooth count or fit

Installation Notes and Tips

Verify tooth count, inside diameter, outside diameter, and thickness before installation. Because this is an automatic transmission hard part, proper alignment and correct starter engagement are critical. Confirm the vehicle application against the listed fitment for Dodge Dart, Dodge Aries, Plymouth Reliant, or Plymouth TC3 before replacing the original ring gear.

Quality Assurance

Pioneer Cables designs this ring gear to match original part fit and function for the listed applications, supporting durable service in automatic transmission repairs. The FRG-139A is specified with OE-style dimensions to help ensure correct starter engagement and long-term reliability.