ZF 4HP22/24 Torque Converter

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.