Test equipment for the Automatic industry has advanced significantly in recent years, and since modern vehicles are fully electronic and complex systems, we use only the latest diagnostic equipment. See below some tools and modification undertaken by Signature Transmissions.
Automatic Transmission Test Unit HT-2000 The portable Hydra-Test HT-2000 unit allows the operator to test the hydraulic integrity of the individual components in the automatic transmission unit. With a simple connection, clutch and band operation can be diagnosed.
Bench testing the transmission unit can save valuable time by reducing unnecessary installation and removal of the automatic gearbox from the vehicle. A test plate is attached to the transmission. Then using the flow meter, the operator performs a test to indicate the amount of leakage at the piston or servo seals. A pass/fail condition can be determined.
Testing and calibrating solenoids using the correct test equipment highlights defective parts, electrically and hydraulically. The integrated solenoid test machine allows us to hot & Cold test solenoids, pulse clean and adjust using plotting graphs. We are able to pinpoint fault components, allowing us to change that individual component/s This helps signature keep rebuild costs down, as we wont be changing a complete Valve body assembly or control unit.
Sonnax Zip Kits targets the root cause of multiple complaints by sealing the critical circuit pressure losses in the valve bodies. The zip kits contain uniquely designed parts to prevent the loss of pressures within the main line. Resolves critical hydraulic pressure loss, caused by commonly worn components
Zip kits and over size valves are changed on 80% of Signature’s rebuilds. As valves move in their lands surrounded by fine debris particles, it creates a fine paste which can be abrasive, this after time eats into the lands and cause pressure loss ending in defective components inside the transmission.
There are also bench testing methods used by our Technicians to check Valve Body spools. We use the air decay tester seen on the images below. To perform a vacuum test, the rebuilder seals a circuit with a plate or pad, moving between circuits to test various areas. Once clean, the entire valve body casing can be checked for valve to bore tolerance. Other benefits include the ability to remove valves from the bore, check boost sleeve wear and the condition of solenoid seats. vacuum test gauges produce specific data that make for an easier diagnostic learning curve.
This tool has the same capability of the dealerships coding equipment. It is mainly used for pairing, re-programming & re-flashing ECU’s/TCM control units to vehicles. We can calibrate and set up clutch volume/clearance on the DSG 0AM (dry clutch) as well as setting driver values on road adaptions.
We also use other pass through tools that allows use to software code on numerous amounts of different Makes & Models of vehicles. Our aim is to be completely independent from dealerships, this saves time and money for our customers.