Originally Posted by babymog

If the transmission is not having any driveability problems, I would not do the trans flush, it has a chance of causing problems.

If you're changing to a syn fluid, I suggest draining and changing the fluid in the pan, running a couple of thousand miles to get the new fluid through the system, then drain the pan and TC and change the whole enchilada.

A friend of mine in the trans business says "don't shock the system".

Flushing the system can in some cars cause varnish etc. to come loose and cause a problem elsewhere in the system, also is not as good a lubricant, if it's working well I see no reason to tempt fate. If it's having problems, Trans-X or another flush is probably cheaper than a rebuild and does have a decent reputation of success.