[NiftySVX]

In my opinion yes. According to the repair manual the solenoid should default to a position which will allow full line pressure, which would have the effect of making the shifts very firm, but if the solenoid is not functioning properly for whatever reason and line pressure is allowed to be lower than it should be, there could be a situation in which the clutches or the band were allowed to slip due to lack of holding force, which is bad. I have had this experience first hand, and it killed my transmission in very short order. Go try and check all the measurements everyone has suggested including the measurement across the transmission connector of the A solenoid and the 12 ohm resistor and let us know what you find, replacement of the solenoid pack is not difficult and can be done at a reasonable cost should it be the root cause.