ZF transmission

ZF transmissions

 
 

ZF Transmission Shifts Too Slow

Problem

Solution

Low oil level (aeration of oil) Check and add oil
Low transmission pressure Do Transmission System Pressure Test
Transmission pump suction screen restricted Remove and clean screen
Low transmission pump flow Do Transmission Pump Flow Test
Excessive transmission element leakage Do Transmission Element Leakage Test Using System Pressure
Oil passages restricted between control valve and transmission elements emove control valve and inspect oil passages
Clutch cut-off valve sticking Remove and inspect cut-off valve


ZF Transmission Shifts Too Fast

Problem

Solution

System pressure too high Do Transmission System Pressure Test
Stuck modulation valve Remove and inspect modulation valve
Stuck or missing forward/reverse check valve Inspect transmission control valve
Broken piston return spring Disassemble and inspect clutch

 
 

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