Abstract: An isochoric mechanism for changing transmission fluid composed of a box component, two bags, two valves, a board, plastic tubing, and two adapters. The mechanism ensures that the same amount of new transmission fluid is injected into the transmission system as the amount of old transmission fluid that is drained out of the transmission fluid reservoir. Mechanism is driven by gravity, and usage requires two supports that are of equal height, to support the body of the mechanism using the board component. Valves ensure that the system can be stored and reused. Automatically collects old transmission fluid for recycling, and upon return to the provider, the mechanism may be refilled with new transmission fluid.

Abstract: A canister based transmission filter system, which may be integrated into transmission reservoirs. The system features a filter in the shape of a cylinder or a polygonal prism, and a corresponding transmission filter receiver. The filter has a pleated filtration surface with an integrated magnet, and is inserted into the receiver without need of additional screws, clips, nor bolts. The receiver closes off transmission fluid flow when filter is being changed to prevent contamination of the surroundings, and opens when the filter is installed to allow for filtration. Filter may be quickly changed using only the L-pin provided, and locks itself in place during installation.