St Plate / AW50-40LE / Lm B1 Coast / C3 Underdrive 89+

Steel Plate for AW50-40 / AW50-40LE Transmission | Various Brands | 1989+

This steel plate is a direct-fit replacement for the LM B1 coast and C3 underdrive positions in AW50-40 and AW50-40LE automatic transmissions. Manufactured by Alto Products, it meets OE specifications for fit, thickness, and performance. Ideal for rebuilders and transmission shops servicing vehicles from 1989 and up.

Key Features

• Precision-manufactured by Alto Products for reliable performance
• Correct thickness and flatness for proper clutch pack clearance
• Fits LM B1 coast and C3 underdrive positions
• Durable steel construction for long service life
• Direct replacement for worn or warped plates

Compatibility

Fits AW50-40 and AW50-40LE transmissions in various compatible vehicle brands from 1989 and newer. Please verify your transmission code and application before ordering.

Why Choose This Part?

Alto Products is a trusted name in transmission components, and this steel plate delivers the quality and precision you need for a lasting repair. Restore proper shift feel and clutch engagement with a plate designed to meet or exceed OEM standards. Order now and get your transmission back on the road with confidence.