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ZF 4HP22/24 Torque Converter

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  • Technical

    It is very important that you locate and install your torque converter correctly. One of the most common causes of failure is the torque converter not being located correctly onto the pump before fitting causing the pump to be broken on start up.

    To avoid this we would suggest that you stand the autobox upright and lower the torque converter into the bellhousing.

    When the torque converter has fully located onto the pump it is essential to then measure the distance from the bellhousing front face to the torque converter feet ( also known as the flange that the flexplate is bolted to).

    Once the torque converter is inserted and checked make sure it does not fall forward when offering the autobox up to the engine. Do not be tempted to pull the gearbox into position with the bellhousing bolts, it should fully locate on the engine with no gap between the bellhousing and engine block.

    With the autobox fitted to the engine, check that the converter will rotate freely and has a small amount (about 2mm) of end float. Bolt the converter to the flex plate using loctite or similar on the thread of the bolts.

    Ensure the breather vents well away from the exhaust.

    Torque Converter Distance measurements (from the bellhousing face to the torque converter feet)

    The box code is the last 3 digits of the second number down on the name plate on the left hand side of the autobox.

    Box Code Depth in mm

    061 - 22mm

    064 - 22mm

    065 - 27mm

    332 - 51mm

    593 - 51mm

    699 - 51mm

    631 - 51mm

    727 - 27mm

    728 - 83mm

    740 - 51mm

    741 - 51mm

    742 - 51mm

    744 - 18mm

    773 - 96mm

    769 - 83mm

    768 - 83mm

    767 - 27mm

    766 - 96mm

    765 - 27mm

    764 - 27mm

    763 - 83mm

    759 - 27mm

    757 - 27mm

    748 - 18mm

    747 - 27mm

    Please call if you have any other queries.