ATP Parts YA-1 Speedometer Drive Gear

ATP YA-1 Speedometer Drive Gear

ATP Parts YA-1 is an exact-fit replacement speedometer drive gear for GM rear-wheel-drive applications that use a drive gear housing with an 18-22 tooth driven gear. It is built for direct replacement service in classic Buick, Chevrolet, GMC, Oldsmobile, and Pontiac vehicles where accurate speedometer operation depends on the correct transmission gear setup.

Key Features

• Exact-fit replacement from ATP Transmission Components
• Speedometer drive gear for compatible GM transmissions
• Works with drive gear housings using an 18-22 tooth driven gear
• Direct replacement for select Buick, Chevrolet, GMC, Oldsmobile, and Pontiac applications
• Cross-references Dynomax 35227 for the same application
• Part number YA-1 for easy identification and ordering

Detailed Description

The ATP YA-1 speedometer drive gear is made for vehicles that rely on a transmission-mounted speedometer gear to transmit road speed information to the speedometer. ATP Transmission Components positions this part as an exact-fit replacement, helping restore proper speedometer function in applications such as Chevrolet Camaro, Chevrolet Nova, Pontiac Firebird, Buick Skylark, and GMC truck and van platforms. This part number, YA-1, is also listed with interchange references 74097 and 345215.

Compatible With 1969-1981 Chevrolet Camaro, 1970-1978 Chevrolet Nova, 1975-1981 Pontiac Firebird, and many other GM models listed in the fitment data. It is also used across select Buick Century, Regal, LeSabre, Riviera, Skylark, and Oldsmobile Cutlass, Omega, and Delta 88 applications.

Common Issues This Part Can Address

• Inaccurate speedometer readings after transmission service
• Speedometer needle movement that is erratic or inconsistent
• Incorrect gear ratio setup in the transmission speedometer drive system
• Replacement needs after wear in the original drive gear
• Restoration work on classic GM cars, trucks, vans, and SUVs

Installation Notes and Tips

Verify the transmission uses a drive gear housing with an 18-22 tooth driven gear before ordering. Some listed applications include additional notes, such as 1975 Chevrolet C10 Suburban and K10 Suburban applications that only fit THM350. Match the part number YA-1 to the transmission configuration and existing gear setup for proper installation.

Quality Assurance

ATP Transmission Components markets this part as an exact-fit replacement component, built for direct service in the specified applications. Confirm vehicle year, make, model, and transmission details against the fitment list before installation.