You can diagnose problems with your torque converters on many older transmissions by conducting a stall-speed test. How to install Torque Converter and Automatic Transmission. This video shows the proper way to install a torque converter and install an Automatic Transmission.
Symptoms of a Bad Torque Converter. Problems with the torque converter create symptoms that are often misconstrued as being a transmission that’s failing. As a result, people will end up paying thousands of dollars just to replace their transmission or have it rebuilt. The torque converter is the unit that transfers the force from the engine to the transmission gears in a smooth way.
In short, the torque converter is filled with transmission fluid and have a “fan” or turbine like unit inside of it. First, hold the torque converter horizontally and face down (bolt holes facing towards the ground) so that the fluid will not drain back out. Install the torque converter.
Fortunately, there are a number of signs to look for, and a few basic tests that will reveal if a faulty torque converter is at the heart of the vehicle’s problems. Never bolt the torque converter to the flexplate (flywheel) first, then install the transmission. TH700R 4Lor 4L60E bellhousing to the motor and the torque converter has run into the flexplate a bit too early.