Elvis, thanks for the reply. With no replies, I went ahead and disconnected the battery; neg (-) terminal. After replacing the Oil Filter Hsg & cooler seals and spark plugs, got it all back together & when I first started it, it ran very rough & 4x4 light was on. I turned it off, thinking that I had not connected a coil back correctly, to keep it from throwing a code. Turned it back on 5 minutes later & it ran fine; started right up. As soon as I drove out the drive on a test run, the "4x4" light went out. I assumed that it too had to "learn" where sensors where set.
After further searching, since I have a Valve Cover oil leak & one at the Valvetronic actuator seal and will need to replace both seals, as well as the spark plug seal, I found that the Valvetronic Actuator needs to go through a "self learning" when you disconnect it. The procedure I read mentioned to turn the key to the ON position for 30 sec. then OFF, then back to ON for another 30 sec. before starting the car. All else seems to work fine. I think this also cleared any adaptive transmission shift memory, as I feel that the shifts are different. I don't know, maybe my imagination.

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