Toyota Matrix U341F
In rebuilding today’s transmissions one has to be very careful with the small parts that come in these valve bodies, such as checkballs, solenoid filters, springs and relief valves. These small parts might seem insignificant, but they play a vital role in the function of the transmission. Many rebuilders dread rebuilding valve bodies with all these intricate parts that are so easily misplaced or lost. On the 50-42LE found in many Volvo, Daewoo and Saab vehicles, if the valve-body filters are installed incorrectly they can cause problems such as no reverse or lockup issues.