This gearbox was really bad damaged and the price of repair was extremely hi around 35000€. But depends of the conditions could be much less.

@@plamenvitanov my crane doesn't shift from 5th to 6th gear only stays in 5th what could be the cause

@@abdullahiftikhar5088 different reasons. Could be valve burned out, cable broken, total damage of the clutch, broken seal ring or O-ring, broken spring in hydraulic block, blocked piston in hydraulic block. You need to make a diagnose first. Do you have ZF error code on the dashboard?

@@plamenvitanov it shows the code E.91 on the speedo panel

@@abdullahiftikhar5088 this error say “4 S.C. TO GROUND AT RELAY REVERSE WARNING ALARM TCU detected a wrong voltage at the output pin, that looks like a s.c. to vehicle ground  cable is defective and is contacted to vehicle ground  backup alarm device has an internal defect  connector pin is contacted to vehicle ground backup alarm will be on until TCU power down even if fault vanishes (loose connection) OP-Mode: normal  check the cable from TCU to the backup alarm device  check the connectors from backup alarm device to TCU  check the resistance 1) of backup alarm device