Hydraulic controls are also different between the 6T40 and 6F35 meaning valve bodies and oil passages will not be the same. Valve bodies between 6F35 Generation 1 and 2 are also different which indicates the two are not interchangeable. Solenoid operation and control are also different between 6F35 Generation 1 and 2. In addition, the transmission cooling systems are different between Generation 1 and 2 and cooler configuration can also be different depending on model. This manual will show the disassembly and assembly of both the Generation 1 and 2 transmissions as well as component differences and transmission specifications. This manual is directed towards the professional transmission technician, all builder notes and cautions should be adhered to in order to avoid mistakes or personal injury. Hide full description...