Question about 1999 Jeep Grand Cherokee
I replaced trans. now overheat light & OD off lights stay on. I checked cooler lines they are not clogged trans not actually hot but light is on no codes in ECM.
hi first of all check the temp sensor on the auto box.also check transmission oil cooler that it is not blocked.when the computer for the auto box detects a problem it turns off the over drive.
Posted on Oct 14, 2008
SOURCE: aerostar transmission
The aerostar tranny cooler sits too low away from the trans and tends to become blocked and restrict the flow to the tranny It could not hurt to remove it and flush the cooler out I have had a few aerostars and I have had to flush them all,the tranny fluid came out very dark and smelled very burnt it may not solve your issue but maybe. It has solved a shifting issue for me the 1-2 is smooth as silk now.
Posted on Jan 23, 2009
your trans cooler is restricted. most likely it is part of your radiator and if it is restricted you will either need to replace the radiator or install an aftermarket cooler. have your trans cooler flow checked and go from there
Posted on Jul 27, 2009
I had the same trouble with my 1999 4x4 and it ended up being the governor pressure switch inside the tranny. Just drop the pan and its only a couple of bolts and unplug the wires just above the pan so dont bother to take it to a shop if you can change the fluid yourself you can change this with no problem and dont have to pay someone to do it for you. It should only be about 140.00 or so for the part at the dealer.
Posted on May 15, 2010
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