On My 94' Merc Sable I have a Motor Guard MG-30 installed which is filtering the trans fluid via a Frantz trans adapter. I have had the filter installed since May of 08' and have changed the paper twice. The transmission is a AX4S. I was pondering to myself a couple days ago and wondering what good is this filter really doing, and could it be causing more harm than good?
So, we know the Frantz adapter is basically a brass tube with a orfice in the middle of it with drilled holes before and after the orfice to create a psi differential so oil will flow to and from the MG. Now my concern is this. Factory there was no small orfice in the coller lines and my worry is that the orfice is retricting fluid, which was not in the original design and therefore, could be causing problems. The cooler lines return cooler fluid to the transmission and usually the fluid is used to lubricate components. So how much am I restricting the flow with this setup, if any at all? And if I am restricting the flow wouldn't that in turn cause problems for whatever lays down the cooler line circuit?
Also I worry that the TP may not be strong enough to withstand the high temps of transaxle oil by basically breaking down and adding particles to the ATF which in turn gets junk stuck in valves and solenoids. I worry this because I know TP was not designed to filter 180F oil or deal with additives in the oil. Also what about the glue that is used on the cardboard roll to stick the first TP papers to the roll, the glue has to react someway with the oil?
Also I wonder in the way how the MG seals the role of TP if not an ample amount of oil bypasses the roll at the cardboard tube ends where they meet the copper pipe, also what about the edges of the roll? Basically what I am getting at here, is that filtering with a TP roll though sounds really cool, and it is, what are the disadvantages? In my case with my transmission the original one lasted 102,000 miles before a piston cracked and wouldn't allow the car to go into gear. The failure was mechanical and not lubricant related. So what good am I doing when these transmissions were not designed properly in the first place? A automatic transmission by design wears alot in the clutches, so although I have really clean ATF, does is it really help in the longevity of the tranny? I see the advantage if I am to rebuild the tranny because sun gears and planetarys may have lower wear than a tranny without a MG. So I don't know but lets discuss it.
So, we know the Frantz adapter is basically a brass tube with a orfice in the middle of it with drilled holes before and after the orfice to create a psi differential so oil will flow to and from the MG. Now my concern is this. Factory there was no small orfice in the coller lines and my worry is that the orfice is retricting fluid, which was not in the original design and therefore, could be causing problems. The cooler lines return cooler fluid to the transmission and usually the fluid is used to lubricate components. So how much am I restricting the flow with this setup, if any at all? And if I am restricting the flow wouldn't that in turn cause problems for whatever lays down the cooler line circuit?
Also I worry that the TP may not be strong enough to withstand the high temps of transaxle oil by basically breaking down and adding particles to the ATF which in turn gets junk stuck in valves and solenoids. I worry this because I know TP was not designed to filter 180F oil or deal with additives in the oil. Also what about the glue that is used on the cardboard roll to stick the first TP papers to the roll, the glue has to react someway with the oil?
Also I wonder in the way how the MG seals the role of TP if not an ample amount of oil bypasses the roll at the cardboard tube ends where they meet the copper pipe, also what about the edges of the roll? Basically what I am getting at here, is that filtering with a TP roll though sounds really cool, and it is, what are the disadvantages? In my case with my transmission the original one lasted 102,000 miles before a piston cracked and wouldn't allow the car to go into gear. The failure was mechanical and not lubricant related. So what good am I doing when these transmissions were not designed properly in the first place? A automatic transmission by design wears alot in the clutches, so although I have really clean ATF, does is it really help in the longevity of the tranny? I see the advantage if I am to rebuild the tranny because sun gears and planetarys may have lower wear than a tranny without a MG. So I don't know but lets discuss it.
utlet. Should give you a better prespective. 
