[TurboDiverArt]

Originally Posted by alamantia

I wound up flusing it. It shifts smoother now, pistons engauge and disengauge with out sticking or any more clunking. Should of did it a while ago. Must be an old wives tale. Clean is better than dirty in a pressure sensitive componunt with tiny orifaces in the valve body. I ruled out the theroy that a flushing dislodges particals because the actual flushing is less pressure than what is created in normal driving conditions. The old clutch material acting as a friction modifier makes a little sence, But the fact that oil breaks down and loses its lubricating properties is a fact. New oil will lubricate better than old oil. I personaly think people who flush a trans who are not careful and allow the pan to run dry whan the trans is pumping out the old flud and the front pump sucks up a nice air bubble frying the clutches. Thats probably the culpret. You get some just out of high school kid working at jiffy lube operating a machine between getting high on coffee breaks and he doesnt fill the pan fast enough and you burn out a clutch... that sounds more practical to me. If 1000 transmissions get flushed today and 1 breaks next week we hear about the one that broke, we dont hear abouty the 999 that run better. Then again who knows, my truck may be on the back of a flat bed by the end of the week and i will be eating my words...

I agree that running the pan dry would negate any benefits to replacing old fluid with new fluid. The machine my buddy uses is idiot proof. You disconnect from the radiator, the "in" goes to one port, the "out" goes to the other. Start the engine and the little green light, lights upif the fluid is flowing in the proper direction. The "start" light lights up if the fluid is going in the correct direction and the "fill" fluid hopper is full. If all is good you select the amount of fluid to replace and hit the start button. A valve changes direction and it starts draining old fluid into a reservoir and replacing it with the new stuff at the same rate as it’s taken out. If the new stuff runs out the valve changes back so that you are pumping from the pan again.

I’ve seen the old timers do it by draining it out while having someone pour fresh stuff down the dip stick and then turning the engine off once fresh fluid starts coming out. I wouldn't try it but the old timers seem to have been doing it that way for a long time. Who am I to criticize?

Art.