4L60E, 4L65E, 4L70E

The OE cast aluminum forward piston frequently breaks due to rough castings and high stresses. This billet aluminum forward piston eliminates these concerns by using high strength billet material and a design with added contours in the high stress areas. No machining or modification is required to use this piston and it can be used in all 4L60/4L60-E/4L65-E as long as it is used in conjunction with an aluminum over run piston.

• Eliminates concerns of forward piston breakage.
• Improved durability and strength over the OE's cast aluminum forward piston.
• Can be used in both early and late model transmissions.