ZF Tips with a European Flavor
Rene Van Vlerken
ZF is one of the world’s leading powertrain manufacturers. One of its divisions, in Saarbrücken, Belgium, specializes in producing automatic transmissions for cars.
When you consider working on a ZF automatic, your starting point should be the tag, which leads you to the information and application required for the unit (seeFigure 1).
The first line of the tag is the serial number, which is required to identify which running changes or modifications might apply.
第二行，部件号（STUCKLISTEN）通常是最重要的数字。此数字的前四位数字标识传输类型。例如，1019是4HP20,1043是4HP24，1056是5HP18。
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The last three numbers identify the application. If the tag reads 1058.000.026, it means you have a ZF5HP24 RWD Jag41 (AJ26).
Some tags include the part number from the car manufacturer that uses this type of transmission. For example, NNE4400AA equals Jaguar.
Because there are so many applications worldwide, the tag numbers are an important way to ensure you order the right parts.
When a car with a ZF 5-speed electronic controlledtransmissioncomes into your shop, the first thing I suggest you do is a road test, along with a scan for codes and data. Common complaints are no reverse and slipping in forward.
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If there is no movement in Drive and in manual first, the overrun clutch in the F drum is likely at fault.
There are seldom problems with repairing these transmissions. You can often see a problem and repair it, but you may not have addressed the root cause, as there are often changes or updates in components.
当工作在ZF5HP24你必须确保我们e the newest version of the input shaft A (seeFigure 3).
Secondly, you must check the main pressure regulator valve. The last spool of the valve should be 10mm long. On the older valves, the spool is 9mm. If you have an old valve in your transmission, you must change both the valve and the valve body housing. The new valve number is 1058.327.030 and the valve body number is 1058.327.020 or 022, depending on the part number of the transmission (seeFigure 4).
当您在阀体上工作时，请确保良好地看看通道板下方的小阀体壳体。由于压力，这具有裂缝和触发许多代码的趋势（滑动，第3档，第4档）。（看到Figure 5).
The ZF is generally not a difficult transmission to work on. Just be aware of the part number applications and various design changes along the way.
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