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    • Wayne Colonna

    POWERTRAIN PRO Publisher

    Wayne Colonna is president of the Automatic Transmission Service Group (ATSG) in Cutler Bay, Fla., and a frequent speaker/instructor for transmission training around the globe.

    Operations

    Transmissions slipping in BMW, Audi and VW

    Wayne Colonna
    Jan. 1, 2020
    From time to time a vehicle may come in using the ZF5HP19 type transmission with a complaint of slipping in reverse and/or a flared 2-3 up-shift when hot. In some cases the problem...
    Operations

    Fixing an output speed sensor fault on Fords and Mazdas

    Wayne Colonna
    Jan. 1, 2020
    Sometimes after rebuilding a 4F27E/FN4A-EL transmission, an intermittent P0721 Output Speed Sensor Fault suddenly appears with no drive-ability complaints.
    Operations

    Passion for performance

    Wayne Colonna
    Jan. 1, 2020
    The modifications involved in squeezing out everything a car or truck can put out often are extensive and expensive, but the attitude is “price is no object, whatever it takes...
    Operations

    Dodge 48RE Transmission Transmission Throttle Valve Actuator (TTVA)

    Wayne Colonna
    Jan. 1, 2020
    Beginning at the start of production for the model year 2005, Dodge trucks equipped with the 5.9 diesel and 48RE transmission, were equipped with an electronically controlled ...