My '01 DC Tacoma with 3.4L autotrans will not shift into drive when cold. The shifter goes through reverse goes into Drive but the transmission does not engage drive. If I let off the brakes, the truck inches along, regardless of throttle input. No weird noises or odors. Transmission fluid is at good level.
If I let the truck warm up, then it shifts normally. Once underway after initial crankup, no problems. It shifts fine while driving. The colder it gets here in TN, the more times it happens on initial start up in the mornings.
Toyota shop gave me the usual 5 minute 'we can't mimic it and the fluids are fine'. The truck has 98K miles on it.