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Home >> Lexus >> 2011 >> IS 250C Standard >> Repair and Diagnosis >> Transmission >> Manual Trans >> Manual Transmission (Inspection) >> Manual Transmission System >> Problem Symptoms Table >> Problem Symptoms Table

Problem Symptoms Table

HINT: 

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential cause of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

MANUAL TRANSMISSION SYSTEM

Symptom Suspected Area See
Abnormal noise Oil level (Low) Refer to ON-VEHICLE INSPECTION 
Oil (Wrong) Refer to REPLACEMENT
Synchronizer ring (Input shaft) (Worn or damaged) Refer to INSPECTION
Synchronizer ring (Output shaft) (Worn or damaged) Refer to INSPECTION
Gear (Input shaft) (Worn or damaged) Refer to INSPECTION
Gear (Counter gear) (Worn or damaged) Refer to INSPECTION
Bearing (Input shaft) (Worn or damaged) Refer to DISASSEMBLY
Bearing (Output shaft) (Worn or damaged) Refer to DISASSEMBLY
Bearing (Counter gear) (Worn or damaged) Refer to INSPECTION
Oil leak Oil level (High) Refer to ON-VEHICLE INSPECTION 
Gasket (Damaged) Refer to REPLACEMENT
Oil seal (Worn or damaged) Refer to REPLACEMENT
Hard shifting or impossible to shift Oil (Wrong) Refer to REPLACEMENT
Clutch (Dragging) Refer to REMOVAL
Shift fork (Input shaft) (Worn) Refer to INSPECTION
Shift fork (Counter gear) (Worn) Refer to INSPECTION
Synchronizer ring (Input shaft) (Worn or damaged) Refer to INSPECTION
Synchronizer ring (Output shaft) (Worn or damaged) Refer to INSPECTION
Synchronizer ring (Counter gear) (Worn or damaged) Refer to INSPECTION
Shift key spring (Input shaft) (Worn or damaged) Refer to DISASSEMBLY
Shift key spring (Counter gear) (Worn or damaged) Refer to INSPECTION
Gear (Input shaft) (Worn or damaged) Refer to INSPECTION
Gear (Counter gear) (Worn or damaged) Refer to INSPECTION
Hub sleeve (Input shaft) (Worn or damaged) Refer to INSPECTION
Hub sleeve (Counter gear) (Worn or damaged) Refer to INSPECTION
Jumps out of gear or shift lever moves excessively Shift detent ball spring (Damaged) Refer to DISASSEMBLY
Shift fork (Input shaft) (Worn) Refer to INSPECTION
Shift fork (Counter gear) (Worn) Refer to INSPECTION
Hub sleeve (Input shaft) (Worn or damaged) Refer to INSPECTION
Hub sleeve (Counter gear) (Worn or damaged) Refer to INSPECTION
Gear (Input shaft) (Worn or damaged) Refer to INSPECTION
Gear (Counter gear) (Worn or damaged) Refer to INSPECTION
Bearing (Input shaft) (Worn or damaged) Refer to DISASSEMBLY
Bearing (Counter gear) (Worn or damaged) Refer to INSPECTION