In Reply to: Re: What is this plug for? posted by Travis on July 06, 2025 at 19:27:10:
Travis's AI explanation is correct.
The plug is part # 74-7238 SEAT, Gear Shifter Rail Spring
The gasket is part # NAA-77302A
The spring is part # 79-7234 SPRING, Trans. Gear Shift Rail
The ball is part # 353075-S BALL, 3/8"
The same parts are used on '48-'52 8N's and '53-'64 Tractors with 4-speed transmission.