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Old 12-19-2015, 08:16 AM   #15
CLOUDSPLITTER "Tahawas"
 
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2003 25' Classic
Zanadude Nebula , WNY
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Quote:
Originally Posted by Bob662 View Post
I wonder if at least the later model F-150's have a thermostat on the transmission coolers or perhaps the transmissions themselves. Mine seems to run at 190dF, no matter the outside temperature. With a trailer behind it I'd suspect it may creep up some more, but that's yet to be determined.

Bob,


Most trans coolers will have a by-pass for cold Weather start-ups, just like engine oil, you want the fluid to warm up as quickly as possible. (start & let idle not recommended, (start,oil pressure=drive.)

190* is fine, critical breakout on our Burb is 275*, limp-mode is around 270* steady for 5min.
Ck your vehicle owners manual......


I'm quite sure the Ford Powertrain Control Module is similar and will engage "limp" to help prevent damage.

Bob
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