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Transmissions
 Your
transmission takes the energy created by your engine and transmits it
to your drive train which turns the wheels and makes your car go. We change
gears so we can go faster and slower, up and down hills, forward and reverse.
Your tansmission is a major part of your car and can be a major expense.
If you are hearing strange noises or having problems with jerky movement,
bring your car in and let our experts tell you the best way to fix these
problems.
Automatic Transmissions
| Problem |
Possible Cause |
Remedy/Repair |
| Fluid leakage |
- Defective pan gasket
- Loose filler tube
- Loose extension housing to transmission case
- Converter housing area leakage
|
- Replace gasket or tighten pan bolts
- Tighten tube nut
- Tighten bolts
- Have transmission checked professionally
|
| Fluid flows out the oil filler tube |
- High fluid level
- Breather vent clogged
- Clogged oil filter or screen
- Internal fluid leakage
|
- Check and correct fluid level
- Open breather vent
- Replace filter or clean screen (change fluid also)
- Have transmission checked professionally
|
| Transmission overheats (this is usually accompanied by a strong
burned odor to the fluid) |
- Low fluid level
- Fluid cooler lines clogged
- Heavy pulling or hauling with insufficient cooling
- Faulty oil pump, internal slippage
|
- Check and correct fluid level
- Drain and refill transmission. If this doesn't cure the problem,
have cooler lines cleared or replaced.
- Install a transmission oil cooler
- Have transmission checked professionally
|
| Buzzing or whining noise |
- Low fluid level
- Defective torque converter, scored gears
|
- Check and correct fluid level
- Have transmission checked professionally
|
| No forward or reverse gears or slippage in one or more gears |
- Low fluid level
- Defective vacuum or linkage controls, internal clutch or band
failure
|
- Check and correct fluid level
- Have unit checked professionally
|
| Delayed or erratic shift |
- Low fluid level
- Broken vacuum lines
- Internal malfunction
|
- Check and correct fluid level
- Repair or replace lines
- Have transmission checked professionally
|
Manual Transmissions and Clutch
| Problem |
Possible Cause |
Remedy/Repair |
| Excessive clutch noise |
- A bad clutch shaft pilot bearing will make a high pitched squeal
when the clutch is disengaged and the transmission is in gear
or within the first 2" of pedal travel.
- Noise from the clutch linkage is a clicking or snapping that
can be heard or felt as the pedal is moved completely up or down.
- Transmitted engine noises are amplified by the clutch housing
and heard in the passenger compartment. They are usually the result
of insufficient pedal free-play.
|
- The bearing must be replaced.
- This usually requires lubrication.
- Manipulating the clutch pedal.
|
| Clutch slips (the car does not move as it should when the clutch
is engaged) |
- A worn pressure plate or clutch plate
- Oil soaked clutch plate
- Insufficient pedal free-play
- Bad waste or slave cylinder
- Low fluid
|
- Replace prssure plate or clutch plate.
- Clean/replace clutch plate
- Adjust petal
- Replace slave cylinder
- Add Fluid
|
| Clutch drags or fails to release |
- Too light transmission lubricant or low lubricant level
- Improperly adjusted clutch linkage
- Bad cylinder
- Low fluid
- Air in line
|
- Check/replace lubricant
- Adjust linkage
- Replace cylindar
- Add fluid
- Bled lines
|
| Low clutch life |
- Low clutch life is usually a result of poor driving habits or
heavy-duty use. Riding the clutch, pulling heavy loads, holding
the car on a grade with the clutch instead of the brakes and rapid
clutch engagement all contribute to low clutch life.
|
- Replace Clutch
|
| Transmission shifts hard |
- Improper lubricant viscosity or lubricant level.
- Clutch linkage needs adjustment/ lubrication.
|
- Check/Replace lubricant
- Adjust/lubricate clutch linkage.
|
| Transmission leaks lubricant |
- Lubricant level too high
- Cracks in the transmission case
- Loose or missing bolts
- Drain or fill plug loose or missing
- Vent hole plugged
|
- Check/Replace lubricant
- Inspect/repair/replace
- Inspect/repair/replace
- Inspect/repair/replace
- Inspect/repair/replace
|
| Transmission is noisy in gear |
- Insufficient lubricant
- Worn gears (excessive end-play)
- Worn bearings
- Damaged synchronizers
- Chipped gear teeth
|
- Check/Replace lubricant
- Inspect/repair/replace
- Inspect/repair/replace
- Inspect/repair/replace
- Inspect/repair/replace
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| Transmission is noisy in Neutral |
- Insufficient/ incorrect lubricant
- Worn reverse idler gear
- Worn bearings or gear teeth
|
- Check/Replace lubricant
- Inspect/repair/replace
- Inspect/repair/replace
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