Solenoid C? ....or?

[SilverSpear]

Hey guys,

Trying to get the SVX back on the road again before plunging into the serious stuff at a much later stage.

The history of my auto goes back to 10 years ago when I overhauled it along with my mechanic, everything was replaced by high quality aftermarket parts and used Castrol SuperSyn ATF fluid. since then the car saw only 10k miles on the road, shifts correctly, smoothly, with no issues whatsoever. The ATF is still brand new, no burn smells or anything.

Now a weird thing is happening: Upon morning startup, and putting "D" or "R" after 5 minutes, the car barely steers right or left and something feels sticky with the steering wheel.

After driving for a few mins, I come at a stop and put "N". The tranny disengages only after 3-4 seconds. Those symptoms disappear when the car is on its ideal driving temperature (right in the middle).

Am I facing the Solenoid C thing?