Honda Accord 2008 Manual page 867

07/11/02 08:46:21 61TA0000_140_0024
Automatic Transmission
Symptom Troubleshooting Index (cont'd)
Symptom
Excessive shock or
flares on 4-5
upshift or 5-4
downshift
Noise from
transmission in all
shift lever
positions
Vehicle does not
accelerate above
31 mph (50 km/h)
Vibration in all
shift lever
positions
14-22
Probable Cause(s)
1. A/T clutch pressure control
solenoid valve B defective
2. A/T clutch pressure control
solenoid valve C defective
3. Foreign material in separator
plate orifice
4. 4th/reverse accumulator defective
5. 5th accumulator defective
6. 4th clutch defective
7. 5th clutch defective
1. ATF pump worn or binding
2. Mainshaft bearing, countershaft
bearing, or secondary shaft
bearing defective
Torque converter one-way clutch
defective
Drive plate defective or transmission
misassembled
Notes
• Check for a stored DTC, and check for loose
connectors.
• Inspect the solenoid valve filter/gasket and the
O-rings for wear and damage, and inspect the
solenoid valves for seizure.
• Check the 4th and the 5th clutch pressures.
• Inspect the clutch piston, the clutch piston check
valve, and the O-rings. Check the spring retainer
for wear and damage. Inspect the clearance
between the clutch end-plate and the top disc. If
the clearance is out of tolerance, inspect the
clutch discs and the plates for wear and damage.
If the discs are worn or damaged, replace them
as a set. Inspect the clutch wave-plate height. If
the height is out of tolerance, replace the wave-
plate. If the discs and the plates are OK, adjust
the clearance with the clutch end-plate.
• Inspect the 5th clutch feed pipe. If the 5th clutch
feed pipe is scored, replace it and the O-ring
under the feed pipe guide.
• Replace the mainshaft if the bushing for the 5th
clutch feed pipe is loose or damaged.
• Improper alignment of ATF pump and torque
converter housing may cause ATF pump seizure.
The symptoms are mostly an rpm-related ticking
noise or a high pitched squeak.
• Be careful not to damage the torque converter
housing when replacing the main ball bearing.
You may also damage the ATF pump when you
torque down the main valve body. This will result
in ATF pump seizure if not detected. Use the
proper tools.
• Install the main seal flush with the torque
converter housing. If you push it into the torque
converter housing until it bottoms out, it will
block the fluid return passage and result in
damage.
• Inspect the ATF strainer for clogging with
particles of steel or aluminum. If the ATF strainer
is clogged, replace it, and clean the torque
converter, cooler, and lines.
• Inspect the mainshaft, the countershaft, and the
secondary shaft for wear or damage.
Replace the torque converter.
• Check for a misinstalled/damaged drive plate.
• Check that the idle rpm in gear is the specified
idle speed (see page 11-342). If the idle speed is
correct, adjust the engine and the transmission
mounts.