Pioneer Cables FRG-634 Clutch Flywheel Ring Gear

Clutch Flywheel Ring Gear for Nissan Applications

The Pioneer Cables FRG-634 clutch flywheel ring gear is built for Nissan vehicles that need a direct replacement for worn starter engagement teeth. With 120 teeth and OE-style dimensions, it restores reliable cranking performance when the original ring gear is damaged or broken.

Fits 1977-1983 Nissan 200SX, N/A; Fits 1978-1981 Nissan 510, N/A; Fits 1977-1981 Nissan 810, N/A; Fits 1979-1983 Nissan 280ZX, N/A; Fits 1980-1985 Nissan 720, N/A; Fits 1982-1984 Nissan Maxima, N/A.

Key Features

• Part number FRG-634
• 120-tooth ring gear for starter motor engagement
• Inside diameter: 10.78 in.
• Outside diameter: 12.051 in.
• Thickness: 0.475 in.
• OE-style fit and function for listed Nissan applications

Detailed Description

The FRG-634 is a clutch flywheel ring gear designed to replace worn starter ring gear teeth on select Nissan models. The starter motor engages the 120 teeth to crank the engine, so damaged teeth can prevent proper starting or create intermittent engagement. This ring gear matches the original-style dimensions to support correct fitment on the flywheel and dependable operation over time. This part cross-references AMS Automotive 4470 for the same application.

Vehicle coverage includes Nissan 200SX, 510, 810, 280ZX, 720, and Maxima applications listed above. If you are searching for a Nissan 280ZX flywheel ring gear, Nissan 720 starter ring gear, or a replacement clutch flywheel ring gear for Nissan Maxima, FRG-634 is the direct-fit reference to verify against your original part.

What It Helps Fix

• Starter motor grinding caused by worn ring gear teeth
• Engine no-crank conditions from broken or missing teeth
• Intermittent starter engagement on high-mileage flywheels
• Hard starting related to damaged flywheel ring gear surfaces
• Replacement needs after inspection shows tooth wear or cracking

Installation Notes and Tips

Confirm tooth count, inside diameter, outside diameter, and thickness against the removed part before installation. Inspect the flywheel surface for damage, heat checking, or distortion before pressing or fitting the new ring gear. Proper alignment during installation is important so the starter motor engages evenly across the tooth profile.

Quality Assurance

Pioneer ring gears are engineered to match the original part’s fit and function, with dimensions selected for durability and long service life in the listed Nissan applications.