Regal Velvet Drive 3007000E01, Service Manual, Page: 13 / 72

11
T R A N S M I S S I O N S
®
Section IV Troubleshooting
GENERAL
Before troubleshooting the transmission, do the fol-
lowing .
• Check oil level and condition of oil . See maintenance
section for details .
• Check transmission, oil cooler and oil cooler lines for
physical damage or leakage . Correct any problem .
• Check that engine, damper plate, or drive train align-
ment are not causing the problem .
Refer to shaft alignment section on Page 78 of this
manual .
Perform all pressure checks at normal operating tem-
perature . Refer to specification section for details .
Pressure gauges used should have a range of 0-300 psi .
They must be accurate .
GUIDELINES
When troubleshooting, shift into each selector position
to determine when noise or problem occurs . Determine
which parts are moving . This will help pinpoint the
cause . Use the following information as a guide to com-
mon problems .
Damper Plate. Some transmission problems are damp-
er plate related . Check and/or replace damper plate
when the following problem occurs .
• Transmission “knocks” at idle or low RPM, then stops
at 1,000 RPM or higher .
If the damper plate springs are too soft, the sides of
the windows will wear . If the springs are too hard,
the splines will wear . Consult engine OEM for correct
damper plate recommended .
Clutches. Check and/or replace clutches if the follow-
ing problem occurs .
• Excessive engine RPM (over the rated RPM) . This can
indicate a slipping clutch . The slipping clutch will usu-
ally squeal .
The slipping clutch will normally overheat . This can
result in warped plates . In severe overheating, plates
can weld together . This will cause a tie up condition in
transmission when the other clutch is applied .
WARNING
WARNING: Do not operate trans-
mission if the following condition
is suspected. Failure to comply can
result in personal injury because
transmission cannot be disengaged.