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Mechanical fault without fault code
Note: Transmission
faults may be purely mechanical and do not always affect
transmission function. The following tables help to localise
faults.
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Loud fluttering noise in selector lever position N
or P (stationary vehicle, engine running at idle speed)
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Probable Cause
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Remedy
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Description in operation:
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Incorrect fluid level
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Check fluid level
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"Transmission fluid level, check and correct" 
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Converter malfunction
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Replace converter
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"Converter and/or fluid pump seal ring, replace"
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Fluid pump malfunction
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Check transmission fluid condition, disassemble and clean fluid
pump if necessary.
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"Transmission fluid condition, check"
"Dismantle and assemble oil pump"
"Remove and install oil pump"
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Internal transmission failure
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Check transmission fluid condition, if necessary disassemble
transmission and correct fault.
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"Transmission fluid condition, check"
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Screeching noise in selector lever position N or P
(stationary vehicle, engine running at idle speed)
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Probable Cause
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Remedy
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Description in operation:
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Loose bolts on drive disc
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Replace bolts with new ones and tighten with prescribed
torque
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"Recommended torque values"
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Broken drive disc
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Replace drive disc
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"Drive disk, remove and install" in group "J"
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Transmission not properly attached to engine
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Check engine/transmission alignment, retighten bolts with
required torque.
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"Recommended torque values"
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Converter scrapes transmission housing
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Check transmission fluid condition, if necessary disassemble
transmission and correct fault.
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"Transmission fluid condition, check"
|
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Internal transmission failure
|
Check transmission fluid condition, if necessary disassemble
transmission and correct fault.
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"Transmission fluid condition, check"
|
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Screeching noise when in gear (stationary vehicle,
engine running at idle speed)
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Probable Cause
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Remedy
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Description in operation:
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Worn bushing in fluid pump
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Check transmission fluid condition, if necessary replace fluid
pump.
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"Transmission fluid condition, check"
"Remove and install oil pump"
"Dismantle and assemble oil pump"
|
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Internal transmission failure
|
Check transmission fluid condition, if necessary disassemble
transmission and correct fault.
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"Transmission fluid condition, check"
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Loud knocking or metallic noises in every gear
except for in 4th gear
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Probable Cause
|
Remedy
|
Description in operation:
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Internal transmission failure
|
Check transmission fluid condition, if necessary disassemble
transmission and correct fault.
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"Transmission fluid condition, check"
|
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Fluid leak between engine and transmission when
vehicle is stationary and engine is running
|
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Probable Cause
|
Remedy
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Description in operation:
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Fluid level too high
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Check fluid level
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"Transmission fluid level, check and correct"
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Transmission not properly attached to engine
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Retighten bolts with required torque
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"Recommended torque values"
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Fluid pump bushing damaged or loose
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Check transmission fluid condition, if necessary replace fluid
pump.
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"Transmission fluid condition, check"
"Remove and install oil pump"
"Dismantle and assemble oil pump"
|
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Fluid pump seal ring
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Replace fluid pump seal ring
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"Converter and/or fluid pump seal ring, replace"
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Converter neck damaged or faulty
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Replace converter and fluid pump seal ring
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"Converter and/or fluid pump seal ring, replace"
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Fluid leak when vehicle is stationary
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Probable Cause
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Remedy
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Description in operation:
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Leaky seals or sealed points
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Check axle shaft seals, fluid cooler lines and connections,
transmission housing and sealing points.
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"Replace axle shaft seal rings"
"Remove and install fluid cooler lines"
"Remove and install valve body cover"
"Replace main housing"
"Replace secondary housing"
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