Wiggler wrote:I was going to install an inline WIX filter too... but the transmission shop guys said that it impedes the flow a little too much, and might create what they called a "whirlpool" effect in the lines... any thoughts on that?
Several other NICO members had the same concern when I described the modification, so I temporarily connected a pair of pressure gauges - One in the line coming from the transmission, and the other in the line going back to the transmission. All measurements were made while driving on the road.
Here's the factory arrangement (in-the-radiator cooler only, no filter installed):
Here's the modified arrangement (original and aftermarket coolers connected in parallel, with the output of both coolers flowing through the filter):
So, it doesn't look like the filter introduces any significant backpressure - and the parallel combination actually results in LESS backpressure than the original, factory configuration.
This particular ATF filter isn't any different from a standard spin-on oil filter. In fact, Perma-Cool recommends a couple of "Ford-style" oil filters as replacements, including the Fram PH8A full-sized and PH43 tight-fit part numbers.
Also, I can never get accurate readings on the dipstick... I drained an extra 2 qts of fluid, and after sitting on a level surface for two weeks, it still shows way above the mark...just to be sure... is the dipstick the most accurate way to measure how much is in there???
I've been relying on mine, taking care to measure it with (1.) the car parked on a perfectly level surface, (2.) engine warmed up, (3.) in PARK after moving the selector through all the other gears.
(The owner's manual mentions that you can also use the COLD markings on the dipstick, but should re-check it with the HOT markings after the car is warmed up).
It's quite possible that someone overfilled your transmission at some point.