Common Transmission Problems
Types of Issues
At Tamworth Manual Transmission Factory, we've compiled a list of common transmission problems and their cures. See below:
Diff shuddering while turning corners?
- Old oil: Change it and fill it to the correct level.
- Broken, worn or seized limited slip diff: Strip and replace worn parts.
- Incorrect oil: Drain oil and fill to the correct level.
- No LSD additive: Use the correct additive.
Having trouble shifting?
- Oil too thick: You’ll notice this especially during cold weather and in the first few kms of driving. Use thinner oil to correct this.
- Clutch not disengaging: Check clutch operation and adjust or replace as needed.
- Syncros or sleeves worn out: Strip gearbox and replace parts as needed.
- Bent or seized selector rods (Holden 4-speed typical): Replace broken/worn parts.
Loose gearshift?
- Bolts holding shifter have come loose.
- Shifter bush worn, broken or missing.
- Pins in shifter housing worn or missing.
- Thread on shifter nut or housing worn out.
Noisy gears?
- Diff bearings or gears need stripping and replacement.
- Diff or transfer case low on oil. Refill to the correct level.
- Transfer case needs stripping and replacement. - 4WD transfer case chain slipping. Replace transfer chain.
- Front-wheel drive transaxle bearings or gears worn out. Strip and replace worn parts.
Contact us to enquire or book a service.
Types of Issues Continued
All gears but the fourth are noisy (rear-wheel drive)?
- Gearbox bearings or gears worn out. Strip and replace worn parts.
- Gearbox oil low. Fill with correct oil to level.
- Mainshift tip or tip bearing worn. Strip and replace worn parts.
- Constant mesh gears worn out or broken.
No drive when gears are selected?
- Clutch slipping or centre stripped out. Replace clutch and machine flywheel.
- Mainshaft or output drive spline worn out or stripped.
- Broken axle.
- Worn diff splines.
- Woodruff keys in countershaft stripped (will drive in 4th only).
- Input gears stripped. Replace broken gears.
- Drive flange spline stripped. Replace spline pieces.
Clutch pedal sticking to the floor?
- Clutch master cylinder faulty. Check fluid level is correct.
- Clutch slave cylinder faulty. Check fluid level is correct.
- Gearbox nose cone broken off. Replace broken part/s.
- Clutch cable seized or broken. Replace parts as needed.
- Clutch fork or pivot ball broken. Replace parts as needed.
Can’t select first gear?
- Clutch not disengaging. Check cylinders, cable and clutch itself. Replace as needed.
- Syncro or sleeve worn out. Strip gearbox and fit parts as needed.
- Shifter or shifter bush worn out. Replace parts as needed.
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