Note:

Piston PlatePart No. AL-DA-4P Sonnax piston plate AL-DA-4P, along with the required solid, flat head rivets AL-RV-4, replaces failed plates in Allison 1000/2000/2400, 2006-later converters. The piston plate has an improved design with increased wall thickness in critical areas, making for a stronger and more durable piston. Steel-forged for enhanced strength and durability Lockup surface machined of specific requirements to ensure a solid bond Note: To make this assembly you will need an Allison 1000/2000/2400, 2006-later style piston damper assembly, Sonnax piston plate AL-DA-4P and 12 Sonnax rivets AL-RV-4.