Mechanical Errors without Error Codes Notice: Errors in the transmission may be of a purely mechanically nature and not always affect the transmission function. The following tables should provide assistance with error determination.
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Loud whining noise in selector lever position N or P (vehicle stationary, engine running at idle speed) |
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Probable cause |
Remedy |
Description of the operation |
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Incorrect fluid level |
Check fluid level |
"Transmission Fluid Level, Check and Correct" |
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Malfunction of the converter |
Replace converter |
"Converter and/or Fluid Pump Gasket, Replace" |
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Malfunction of the fluid pump |
Check transmission fluid level, if necessary disassemble fluid pump and clean. |
"Transmission Fluid Level; Check ", "Fluid Pump Assembly, Multi-disc Brake B1 and B2 (AF 20), Overhaul" or " Illustration: Fluid pump Assembly (AF 13)". |
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Internal transmission malfunction |
Check transmission fluid level, if necessary disassemble transmission and rectify errors |
"Transmission Fluid Level, Check " |
Mechanical Errors without Error Codes (Continued)
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Squealing noise in selector lever position N or P (vehicle is stationary, engine running at idle speed) |
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Probable cause |
Remedy |
Description of the operation |
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Loose fastening screws on drive disk |
Replace fastening screws by new ones and tighten with specified tightening torque |
"Recommended Torque Values" |
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Drive disk broken |
Replace drive disk |
"Drive Disc, Remove and Install " in group "J" |
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Transmission not correctly fastened to engine |
Check correct alignment of engine/transmission, tighten fastening screws with specified torque |
"Recommended Torque Values" |
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Converter chafes on transmission case |
Check transmission fluid level, if necessary disassemble transmission and rectify errors |
"Transmission Fluid Level, Check" |
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Internal transmission malfunction |
Check transmission fluid level, if necessary disassemble transmission and rectify errors |
"Transmission Fluid Level, Check " |
Mechanical Errors without Error Codes (Continued)
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Squeaking noise with engaged gear (vehicle stationary, engine runs at idle speed) |
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Probable cause |
Remedy |
Description of the operation |
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Worn bush in fluid pump |
Check transmission fluid level, if necessary replace fluid pump |
"Transmission Fluid Level, Check", "Fluid Pump Assembly, Multi-disc Brake B1 and B2 (AF 20), Overhaul" or " Illustration: Fluid Pump Assembly (AF 13)". |
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Internal transmission malfunction |
Check transmission fluid level, if necessary disassemble transmission and rectify errors |
"Transmission Fluid Level, Check" |
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Clear knocking or metallic noises in every gear except 4th. gear |
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Probable cause |
Remedy |
Description of the operation |
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Internal transmission malfunction |
Check transmission fluid level, if necessary disassemble transmission and rectify errors |
"Transmission Fluid Level, Check" |
Mechanical Errors without Error Codes (Continued)
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Fluid leak between engine and transmission with stationary vehicle and running engine |
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Probable cause |
Remedy |
Description of the operation |
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Fluid level too high |
Check fluid level |
"Transmission Fluid Level, Check and Correct" |
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Transmission not correctly fastened to engine |
Tighten fastening screws with specified torque |
"Recommended Torque Values" |
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Fluid pump bush damaged or loose |
Check transmission fluid level, if necessary replace fluid pump |
"Transmission Fluid Level, Check", "Fluid Pump Assembly, Multi-disc Brake B1 and B2 (AF 20), Overhaul " or " Illustration: Fluid Pump Assembly (AF 13)". |
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Fluid pump seal ring damaged |
Replace fluid pump seal ring |
"Converter and/or Fluid Pump Seal Ring, Replace" |
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Converter neck damaged |
Replace converter and fluid pump seal ring |
"Converter and/or Fluid Pump Seal Ring, Replace" |
Mechanical Errors without Error Codes (Continued)
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Oil leak with stationary vehicle |
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Probable cause |
Remedy |
Description of the operation |
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Untight seals or sealing seams |
Check axle shaft seals, check oil-cooler lines and connections, transmission case and watertight points |
"Axle Shaft Seal Ring, Replace ", "Oil-cooler Lines, Remove and Install", "Cover of Auxiliary Housing, Seal or Replace", "Side Cover, Seal or Replace", "Main Housing, Replace", "Auxiliary Housing, Replace" |
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