The illustration below shows the area to check for clutch drum “E” spline wear. 025” thickness also spreads the energy of the apply over more surface area. 025” of material is almost double the amount of total tooth contact area. 035” of the original thickness steel cores.

The steel cores of the enclosed friction plates are. Buy Master Overhaul Kit (With Steels), ZF4HP22, 1984-Up, D69006A DK8200A ZF 4HP22: Transmissions & Parts - FREE DELIVERY possible on eligible. As the friction plate teeth on clutch “F” rock back and forth with this motion, the teeth begin a peening effect on the splines of the clutch “E” drum. With diesel equipped vehicles, the engine pulses tend to aggravate the condition even more. During the time that the elements are applied, vibratory resonance from the TCC tends to rock clutch drum “E” back and forth slightly but with considerable force.

When a ZF4 series transmission shifts into 4th gear, clutch pack element “F” applies, which then allows the rear planetary section to lift and rotate. What are the reasons to install this kit? It is excellent insurance for your quality rebuild. The kit comes with a new filter and front pump bushing. Also included is a Transtec soft parts kit with every rubber seal and gasket that youll need to complete your rebuild. This kit contains all clutches and steel plates. The kit offers the same extended durability to avoid a potential comeback or rework even when a NEW clutch “E” drum is installed. Product Details Master rebuild kit for the ZF-4HP22 transmission in the BMW, Jaguar, Volvo, Peugeot. The thicker steel core of the enclosed clutch “F” friction plates allows the reuse of a worn splined clutch “E” drum. ZF4HP22 Transmission Clutch 'E' Drum Saver Powerpack

Zf4hp22 rebuild manual