Pioneer Cables FRG-166W Automatic Transmission Ring Gear

Automatic Transmission Ring Gear for OE-Style Replacement

Pioneer Cables FRG-166W is an automatic transmission ring gear built around the key dimensions needed for a proper starter engagement. With 166 teeth, a 13.965-inch outside diameter, 12.907-inch inside diameter, and 0.379-inch thickness, it is sized for direct replacement in supported Buick, Pontiac, and Oldsmobile applications.

This ring gear is used where worn or broken starter teeth prevent the engine from cranking normally. FRG-166W is a practical replacement for vehicles such as the Pontiac Firebird, Pontiac Grand Prix, and Buick LeSabre when the original ring gear has reached the end of service life.

Key Features

• Part number: FRG-166W
• 166-tooth automatic transmission ring gear
• Inside diameter: 12.907 inches
• Outside diameter: 13.965 inches
• Thickness: 0.379 inches
• Built to match original fit and function for supported applications
• Cross-reference part numbers include 166W and RG166W

Detailed Description

Pioneer Cables FRG-166W is an automatic transmission ring gear designed for starter engagement in OE-style drivetrain service. The tooth count and dimensions are critical for proper alignment with the starter motor, and this ring gear is specified with 166 teeth, a 13.965-inch outside diameter, a 12.907-inch inside diameter, and a 0.379-inch thickness. When the original ring gear teeth are worn, chipped, or broken, replacement is required to restore reliable cranking performance. FRG-166W is listed for a broad range of classic GM vehicles, including Pontiac Firebird, Pontiac Grand Prix, Buick LeSabre, and related models.

Common Problems This Part Can Address

• Starter motor grinding during engine cranking
• Engine no-crank condition caused by damaged ring gear teeth
• Intermittent starter engagement
• Visible wear, chipping, or breakage on the flywheel ring gear teeth
• Repeated starter damage from poor tooth engagement

Installation Notes and Tips

Verify tooth count and all dimensions before installation. This part is listed for automatic transmission applications only, and fitment should be matched to the vehicle’s original ring gear specification. Proper starter alignment and inspection of the starter drive are recommended during replacement to help prevent repeat wear. Fits 1979-1981 Buick Century, N/A. Fits 1976-1981 Pontiac Bonneville, N/A. Fits 1976-1981 Pontiac Catalina, N/A. Fits 1976-1981 Pontiac Firebird, N/A. Fits 1979-1981 Pontiac Grand LeMans, N/A. Fits 1976-1977 Pontiac Grand LeMans, N/A. Fits 1976-1981 Pontiac Grand Prix, N/A. Fits 1981 Pontiac Laurentian, N/A. Fits 1976 Pontiac Laurentian, N/A. Fits 1979-1981 Pontiac LeMans, N/A. Fits 1976-1977 Pontiac LeMans, N/A. Fits 1981 Pontiac Parisienne, N/A. Fits 1976 Pontiac Parisienne, N/A. Fits 1977-1980 Buick LeSabre, N/A. Fits 1979-1980 Buick Regal, N/A. Fits 1978-1980 Pontiac Grand Am, N/A. Fits 1979 Oldsmobile Delta 88, N/A. Fits 1978 Buick Riviera, N/A. Fits 1977 Buick Skylark, N/A.

Quality Assurance

Pioneer Cables designs this ring gear to match the original part’s fit and function for durability and long service life in supported applications. Part number FRG-166W is intended for direct replacement use where the OE ring gear specification calls for 166 teeth and the listed dimensions.