Overheating Issue

PCT said:

6 speed correct? Mine never runs above 150, unless it's hot and towing then it gets up to 180-190, once to 205.

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thetrinidad said:

Yes 6 speed it will get up 158 when its hot in idle most I have ever seen was 185 while towing 6000lbs. Its weird because it will take a while to go over 185 and doesn't cool it down. Haven't checked the cooler if it is clogged. Will write back once I check.

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PCT said:

I bet your tranny cooler is plug. If the coolant was as dirty as it was, when you flushed it it probably caused grime to be released and turned to mud and plugged the cooler.

Try flushing it again with chemicals (flush cleaner) motorcraft makes a good one... If it doesn't fix it I would try replacing the trans cooler.

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thetrinidad said:

I flushed out the tranny cooler and still have same issue.

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Casper said:

Easily over looked is the radiator cap. No kidding, if they didn't replace it when they replaced radiator it may have prolonged your pain.

Its spring loaded to release pressure in an over heat, and getting to 221 F shows your system is holding some pressure, but if the cap were simmering you could be loosing pressure containment in turn allowing your coolant to flash off.

Worth looking anyway.

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ExpressRules said:

A few months back I bought my daughter a 2003 Durango SLT Plus with the 4.7. It started over heating on her and I topped of the coolant and idled it for a long time and temp stayed perfect. But, soon as I brought the RPM's higher coolant started gushing from the cap. So, as Casper says, replace it.

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thetrinidad said:

Enginge runs cool now and the cap was replaced since day one. Forgot to put that in the list. Just having problems with tranny now. Don't trust the dealer now as they were just a pain in the ass. And did not want to give back my money.

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