Join Date: Nov 2001
Location: N.Dakota, United States of America
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There is no problem with the standard fluid and filter change. It is this big push to do "full trans system flush" that causes issues, also swapping out the fluid 2 or three times in a very very short period of time with the thoughts of "getting out every drop of old fluid including that which is in the converter". The problem arises with a vehicle that hasn't had proper fluid changes throughout it's life. They start to build up deposits in the passages and valving and then you flush out all the old fluid and put in all new fluids and with their brand new detergents it starts loosening up the deposits and causing that crap to start circulating around and that's what will jam up the valving and plug passages. A properly maintained vehicle WILL NOT suffer any detrimental effects from a proper fluid and filter change. And changing fluid in the proper manor should not cause issues either as your only replacing some of the fluid and not giving the trans and "overdose" of detergents.
As to the issue at hand, trans fluid blowing all over, check the vent tube on top of the trans for starters, yes the "snorkel them on the XJ auto trans too. If that's clear, then over heating fluid is a good possibility and you'll need to find out why it's happening. I would be looking at the brakes also, as a dragging brake would cause more heat buildup in the trans, not to mention the damage it can do at the wheel that it is dragging on. Can wipe out bearings and seals in a hurry. It may not be your issue but would be worth checking as it can be a "free" diagnosis you can do yourself.
As for adding anything other than transmission fluid, I personaly do not use or recomend "Magic fix in a bottle". That can be just as bad as a full on trans fluid flush, again knocking sludge and deposits loose and causing trans failure.
Just my opinions on the subject for the moment. Good luck.
90 XJ 4.0 lift 4 1/2", 31 x 10 1/2 MT's
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Last edited by krabysniper; 08-16-2009 at 12:35 PM.