Re...white smoke, especially from drivers side...this is an auto truck...the trans uses a vacuum modulator that senses engine vacuum to determine shift quality...the vacuum line from the trans fits into a small rubber line that plugs into the rear of the manifold .....if the vacuum modulator splits and they do regularly...the engine vacuum will suck transmission fluid up into the manifold and with the result lots of white smoke....and I mean lots...
Remove the vacuum hose to the trans and plug the manifold port...then run the engine again...it will take some time to burn out the trans oil in the manifold if this has been leaking...
If it leaking, they are relatively easy to replace...but we will cross that bridge later.
