I believe in the KISS principle. The reason you're getting an unwanted pull during warm up is high idle speed. Figure out why the engine is idling too fast while it's warming up, fix that problem, and the "transmission" problem will disappear.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!