Trans flush... placebo or worthwhile?

Our fleet of Caravans used to average 40K to a trans.

Unless you got stuck and spun the tires in the winter, then you could plan on a new one soon.

Welll I just don't believe in the flush! The pressure stirs up mud, and can blow seals.

Dump the warm old oil out of the pan, wash and blow gently the filter screens if you can, and reuse everything. Some filters need to be changed as you can't get inside to make sure all debriss is gone.

I am now retired , and have done this all my life, and also to my kids and grandkid cars and trucks, never had any problem except the 1997 Caravan.

Chevychase

In 1950, this would not have been an issue

Nope, wrong. Should have been "cold".. This singing comes from a weaning of atf pressure, or from this singing pressure valve.

I cant, at the moment, recall the exact name for this valve, but can find it if anyone is interested.

I won't work on this car myself, and it seems that both of the garages that are with the fleet program don't do the simple "drop the pan and change the screen" service.

So far i've put a couple hundred miles on it, and the shift quality still feels better than it was. Darn near perfect, in fact. Only quibble with the trans is the programming of the torque converter - it unlocks whenever you take your foot completely off the gas, and it's fairly loose, so no compression braking. Probably good for gas mileage, but means lots of riding the brakes in traffic or going down hills.

nate