Profile: Cottingham Engineering Ltd. specializes in torque converter remanufacture for both OE and aftermarket, sub-contract engineering, jig & tool design & manufacture. We also offer production line breakdown repairs, welding and fabrication, repair & re-design of components for the automatic transmission industry. Solenoid cleaning tool kit has been specially designed to return the canister to original, then closing the entire solenoid leaving it as if it had never been apart in the first place.