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[Skydiver]

Seems like every time I get back on this forum, I get confused with all of the advice (sometimes conflicting).
So, I need to change my transmission fluid tomorrow. About 237,000 miles on the original transmission, and the fluid hasn't been changed for a LONG time (don't ask because I couldn't tell you).

1) I read that if you haven't changed the fluid in a long time, that completely changing it out (flushing) would be bad because it would break loose varnish or something in the engine. So should I just drop the pan and drain the torque conv. and refill so that I'm not changing it all at once? Then do the same thing in maybe another 15K or so miles (or maybe do a complete flush at 15K or so miles)?

2) Temps here are now around freezing for highs. For a flush (doing it myself), will I be able to get the trans temp high enough (just by driving on the highway for a while to bring the temp up to normal) so that the fluid doesn't puke out when I do the flush? Not sure what the puking is, but it doesn't sound pleasant.

3) If I do the flush myself, does anyone have a picture of the actual line that I'll be hooking the clear hose to? I've seen the diagram on the FAQ flushing topic, but I can't tell by that which line it is. If you try to explain the line by where it comes from or it's purpose, you're going to lose me.

4) My first step was to search this forum for the answers to all of the questions I have, so I did try that route.

Thanks.