The differences between the 700R4 and 4L60E transmissions come from their design and used dates. The 700R4 was used earlier and is mechanically controlled.
The 4L60E is the latest in a long line of durable, high-function GM overdrive automatics that have come our way since the 1960s. The TH350 three-speed automatic had long been a mainstay with Chevy ...