GM 4L65E Archives - Transmission Digest
American Powertrain adds GearStar automatic transmissions for Ford, Chevy, Mopar

American Powertrain announced that it has added GearStar automatic transmissions for Ford, Chevy, and Mopar. Transmissions include the 4L60E for SBC, BBC and early LT engines; the 4L65E for LS and late LT engines; SB and BB Mopar and Gen III engines; the 4L80E for LS engines; and late model LTs and the 4R70W for Ford small block engines.  Each GearStar

Sonnax introduces 4L60-E, 4L65-E heavy-duty remanufactured valve bodies

Sonnax highlights its heavy-duty remanufactured valve bodies for ’96–’08 GM 4L60-E/65-E transmissions. Two part numbers are offered: GM053-HD, which the company says offers improved sprag/clutch durability in D3 first and second gears; or GM054-HD (pictured above), which adds overrun clutch control to those gears plus D4 first, second and third, the company says.

Sonnax-GM054-HD-600
GM 4L65E: The Purpose of Omitting the #5 Ball

Wayne Colonna describes a 4L65E with a modified valve body spacer plate where the #5 checkball was left out.

Checkball-tech-talk