Transmission testing apparatus and method

Apparatus for testing an automotive transmission having a drive input and a pair of drive outputs each of which may be driven in a selected one of two different directions from the input, said apparatus comprising an input drive shaft for connection to the transmission drive input;

• a pair of output shafts for connection to the respective drive outputs of the transmission;
• a single driven shaft;
• means coupling each of said output shafts to said single driven shaft;
• driving means coupled to said input drive shaft for driving the latter;
• and load driving means coupled to said single driven shaft for imposing a load on the latter, said coupling means comprising a toothed sprocket wheel fixed on each of said output shafts, a pair of companion sprocket wheels fixed on said single driven shaft, and sprocket chains drivingly connecting the associated sprocket wheels.

Apparatus for testing an automotive transmission having a pair of drive outputs each of which may be driven in a selected one of two different directions from a single drive input, said apparatus comprising an input drive shaft for connection to the transmission drive input;

• a pair of output shafts for connection to the respective drive outputs of the transmission;
• a single driven shaft;
• non-slip, positive drive transmitting means coupling said driven shaft to each of said output shafts and precluding any rotation of either one of said output shafts without corresponding rotation of the other in the same direction and at the same speed of rotation as said one of said output shafts;
• and means coupled to said driven shaft for imposing a load on the latter.