Hi.. I'm keen to swap the auto out of an 88 240 and replace with manual. Are there any threads (with pics) that someone can steer me to so I can follow the process. I am aware of the differences between the M46 & M47 re electric O/D vs straight 5 spd but is one better / stronger than the other or generally more preferred? I've also read that synchros in the 240's aren't strong. It this true & if so are parts available? Thanks