tranny temp between 180-200 during driving - Ford Powerstroke Diesel Forum
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Old 02-25-2008, 05:24 PM
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tranny temp between 180-200 during driving

k i think have a problem, my tranny temp gauge gets up to about 180degrees within 10 min of normal driving in 60 degree weather, it doesnt feel like anything is slipping in the tranny and shifts smooth. why would my temps be getting this high??
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Old 02-25-2008, 05:25 PM
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low tranny fluid??
not getting enough cooling effect up front??
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Old 02-25-2008, 07:11 PM
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something is causing excess heat... could be a slipping TC or something else.... i would have it checked out by a prof..... it shouldnt be getting that hot under normal driving with 60 degree weather outside
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Old 02-25-2008, 07:19 PM
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if its been a wile (more then 30,000 miles) you could have a pluged cooler line from dirty oil. start with a trans service and flush your cooler lines
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Old 02-25-2008, 07:38 PM
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I had the same thing on my 99 and it was the torque converter, have seen the cooler lines get plugged also, better find out though or you will be putting a tranny in.
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Old 02-25-2008, 09:57 PM
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i also very highly recommend a external trans filter... Bob at Diesel site sells one of the best external filter kits around....
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Old 02-27-2008, 05:13 AM
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It is probably your bypass line, they are known to go bad. Some folks eliminate them. Your temps aren't near dangerous levels but they shouldn't be that high in umloaded winter driving. Get the trans up to temp and grab the bypass line. If it is warm the bypass valve is bad and you need to replace the line.
Good Luck
NCH
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Old 02-27-2008, 06:26 AM
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Definitely check the bypass and make sure the fluid is flowing to the stock tranny cooler. My original tanny ran hot like that. I put a trans go tugger shift kit in it and a 40k Trucool aux tranny cooler on it and that made it last another 3 years and 65,000 miles before I finally smoked it. Changing to a synthetic like Amsoil might also be a good idea.
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Old 02-27-2008, 06:50 AM
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To add to what everyone else is saying.. make sure your temp sensor is taking readings from the service port on the driver side of the trans.
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