Automatic Transmission Fluid proving Ground Tests

Satisfactory operation of such  fluid is  observed  during  a 2000 mile  schedule  on proving  Ground Automatic   Transmission  Performance Test  Schedule. This requires a new or rebuilt Hydro Matic transmission   in stalled in a car. Characteristics of the fluid, such as viscosity at 200 degree F before and after the test are observed. Tendency to squawk is noted and also smoothness of operation.