ZF Automatic Transmissions Service Manual
2.3.6 Fault Finding Chart (continued)
a
0
0
a
Problem
Leakage at breather
Leakage from oil cooler circuit
Leakage at intermediate plate
Leakage between gearbox and
extension housing
General
Noise and associated
interruption of power
Loud noise with no drive
forward or reverse
Groaning or buzzing noise (can
sound like mechanical damage)
in all selector positions,
especially when cold.
Sucking noise from pump.
Loud noise on converter clutch
engagement
Engine vibrations when
converter clutch engaged
Possible Cause
Oil level too high.
Incorrect oil specification.
Breather cover missing.
Breather cover
'0' ring faulty.
Breather cover loose.
Pipe lock nuts loose.
Pipe line faulty.
Oil cooler leaking.
Intermediate plate plug leaking
Fastening screws loose. Gasket
faultv.
Oil filter dirty
Drive plate to converter connection
damaged.
Pump drive damaged.
Oil level too low.
Valve block leaking.
Torsion damper defective
Change point too low
Action
Rectify.
Change
oil and flush system.
Replace breather cover.
Renew
'0' ring.
Renew lockwasher.
Torque tighten.
Renew relevant pipes.
Renew oil cooler.
Torque tighten plug.
Renew sealing washer.
Torque tighten
Renew gasket.
Clean
/ replace filter. If clutch debris
found, renew transmission, flush
cooling system
Renew drive plate and converter as
necessary.
Renew transmission.
Rectify.
Renew valve block.
Renew converter
Check TCM
Issue 1 August 1994 67
