Kit repairs laminate disc and seal failures only it will not rectify electrical breakdown. Installing Sonnax pressure switch rebuild kit 124740-30K restores normal switch operation, eliminating codes and providing renewed shift performance in all ranges.īefore installing kit, test switches to verify proper electrical operation. It is no longer necessary to replace the expensive TEHCM assembly to rectify this concern.
Since switches cannot be obtained through OE channels, replacement of the TEHCM was the only previous remedy available. If more than one switch breaks down, failsafe mode can be triggered. Mac Tools will repair your tool to the manufacturer’s specifications. If you do not have a distributor servicing your shop you can send items directly to Mac Tools for repair. As time goes by, the laminated portions of the pressure switches can breach, preventing normal switch operation. Mac Tools operates a world class repair center for repairing air tools and some electronic tools. These codes may be accompanied by TCC apply problems or shift irregularities such as slipping, flares, harsh application, and bind-ups. GM 6-speed transmissions often set various trouble codes related to failures of fluid pressure switches that are internal to the transmission electro-hydraulic control module (TEHCM).
