Awhile ago I had posted regarding a problem I was having with my 1994 Volvo 850 wagon with an automatic transmission. I had had the transmission oil changed and afterwards when I started it up first thing in the morning on days that the weather dipped below 40 degrees the transmission wouldn't shift out of first until it was warmed up (usually about 2 minutes). If I tried to manually put it into second while moving it wouldn't grab but instead shifted into neutral. Once warmed up it would be fine and shift perfectly for the rest of the day.

I did some research and somewhere read that the computer calculates shift points based on speed and amount of throttle and that it "remembers" the settings. So what I did was to 'reboot' my car by disconnecting the battery for 24 hours.

After reconnecting the battery I've never had the problem again, in spite of the fact that it rarely gets over 40 degrees here this time of year. Shifting is smooth regardless of how warmed up the car is. So if you have that problem, it may be worth a try.

Chuck