It is probably hard to see but the picture of the Motor Guard filter on my Camry automatic has a transmission adapter with a pipe plug upstream of the adapter and one downstream so that I could check the pressure drop thru the adapter. You can get a lot of fluid thru a 1/8" orifice, enough to cool two transmissions. I have since started drilling the element bypass in the filter. That wasn't possible with the old Motor Guard. The newer Motor Guards are less restrictive than the Frantz and a lot less restrictive than the old Motor Guards. I guess I just always trusted Frantz when they came out with the ATF adapter and they always worked for me. My diesel Ford pulling a fifth wheel trailer isn't exactly a grocery getter. If I had some concerns about restricting the flow of fluid to the cooler I would do it the fool proof way. I would install Perma-Cool auxillary transmission filter kit 771-10678 in jegs.com. Then to get the cleaning down to 0.1 micron I would install a 771-181 adapter to the mount and run two hoses to the Motor Guard. The mount or adapter will take a Ford filter or if you are hurting for room you could install a little filter such as my Camry takes. A bunch of filters will fit the Pera-Cool mount. With the sandwich adapter everything goes thru the spin on filter. Some goes to the Motor Guard to be cleaned first the rest goes thru the relief valve in the sandwich adapter. Tht relief valve will open at about two PSI so there is no resistance of any importance. Nothing gets to the cooler without being filtered. The transmission doesn't care which of the submicronic filters you use.
I like the design of the Motor Guard and always have. You have to use a firm roll of TP and unroll enough paper to make them 4 1/4" diameter. For the big cooler lines like on the newer diesel pickups you can use a 771-10695, it has the 1/2" oil line.
Most people don't realize how many abrasives are in ATF. When you see the white element after it has cleaned the fluid you will know. It is similar to the propane engine motor oil at work. No soot but the wear metal shows up good. Transmisssions will somtimes smooth out as soon as the clean fluid hits the parts.
When I did the Buick I was a kid. I had a gauge on the dash that showed when the high accumulator kicked in and the Motor Guard started filtering. In those days the Motor Guard was rated at 300 psi working pressure. They beefed up the newer ones and rated them for 125 psi. I think they want a big safety factor. They test them at 400 psi. I wouldn't want one in my hands at 400 psi.
They use them for compressed air. The over center clamps are too dangerous for compressed air. At work we run them 24 hours a day at 125 psi. At the time I did the Buick the high accumulator must have been the best pressure at less than 100 pasi. AT the time I thought I invented cleaning ATF. It was considered experimental at the time. Someone forgot to tell me.
I was down at a oil change place getting a safety sticker. They were cleaning up selling transmission flushes. The best thing to flush a transmission is clean fluid.
Ralph