Auto transmission cooler

[nexium]

Thanks for bringing these points out. In reference to the flush chemicals- if it did dissolve the gunk in the filter, wouldn't it also start to work on the rest of the parts, where the gunk came from?
If the fluid exchange is in the normal direction (as opposed to backflushing), the particulate would be caught in the filter wouldn't it? I think this means the filter should be changed after the flush.
I've had very good luck with doing a filter and partial fluid change at 40K intervals. My only failure was a Ford A4LD, with a front seal leak.
From the stories I hear, it's probably best to adhere to the manufacturers recommendations as long as you're under warranty.

[04PTGT]

Originally Posted by nexium

Thanks for bringing these points out. In reference to the flush chemicals- if it did dissolve the gunk in the filter, wouldn't it also start to work on the rest of the parts, where the gunk came from?
If the fluid exchange is in the normal direction (as opposed to backflushing), the particulate would be caught in the filter wouldn't it? I think this means the filter should be changed after the flush.
I've had very good luck with doing a filter and partial fluid change at 40K intervals. My only failure was a Ford A4LD, with a front seal leak.
From the stories I hear, it's probably best to adhere to the manufacturers recommendations as long as you're under warranty.

Yes! You just hit the nail on the head! If you remember on one of my earlier posts I mentioned Pump Cavitation? The junk that gets cleaned off the parts ends up clogging the filter. This causes the pump to starve for oil. If you back flush… all the debris flows with out the benefit of any filtration. Not good.

Now something to note: You understand how a trans operates and are able convey this to the tech. Not everyone is this mechanically inclined. What happens with this customer is not good if they don’t.

Also I mentioned about the lifetime warranty in an earlier post. You will want to do it the way Chrysler wants it done. Or option number 2 is a warranty void.

Also Frosty posted the bulletin. The reason for this was huge number of transmissions were coming back under warranty with wiped pumps! Not to mention this incapacitates the vehicle and puts the customer at risk of an accident.

Chrysler has a system called QNA and this contains info the customer states on what happened. Many of them stated that the pan didn’t need to be removed and saved them from risking a leak. This means that the crud in the pan never got cleaned out.

To be spot on about this…remove the pan change the filter..then flush…then remove the pan again and change filter again. One time we found contamination in parts of the valve body that is filtered. We couldn’t figure out how it got there. How in the heck it got past the filter is beyond me.

The flush chemical wont break down small metal particles. Some small particles in the pan are normal. The tech were getting paid more to do a flush than drop the pan and change the filter. Sooooo this means more money and you don’t even get oily doing it.

So anyone that has a PT with lifetime warranty….do it by the book!

Also note: If you bought the car new and serviced as per Chrysler from day 1….you will not have an issue that would be caused from an oil problem. Bar none!

If you bought it used… you could flush as per above then do it as per Chrysler with no issues and less cost in the long run. Keep in mind dealers and repair facilities make money off this stuff.

[lakersfan1]

Why are we only referring to 'flushes' as using the machine and chemicals? It was my understanding a basic 'flush' was when you: drop the fluid from the drain plug, drop the cooler exit hose hose into a bottle of ATF, and put the intake tube into a drian pan ....... put the transmission into neutral and let it pump the old out while sucking the new in, then top off. At least that's what I do on my wife's car every 30K or so ..... along with a drain and fill every 8K or so.

All this talk of a flush machine. It's not like any of us have a flush machine at home anyways.