DeVille V8-300 4.9L (1993)
concern.
Following is a list of other items that may possibly affect Viscous Converter Clutch (VCC) engagement and release. (Refer to the appropriate Service
Manual for illustration number reference and component location.)
^
Improper operation of PCM
^
Poor connection between PCM to vehicle wiring harness and/or vehicle wiring harness to transaxle pass through connector (35)
^
Converter clutch valve (335) stuck
^
Converter clutch regulator valve stuck (332/334)
^
Turbine shaft seals (519, 520) damaged or missing
^
Converter clutch blow off checkball (420) seated or damaged
^
Damaged oil pump drive shaft seal (228)
^
Missing or mislocated No. 1 checkball (372 [A])
^
VCC solenoid O-ring (316) leaking
^
VCC solenoid (315) inoperative
To prevent sediment from entering the solenoid the spacer plate filter was eliminated (on units built on after Julian Date 027 - January 27, 1993) and
screens were added to the solenoid control and feed passages. Refer to Figures 3 and 4.