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08-15-2008 #8
Registered User
- Join Date
- Aug 2005
- Location
- Patterson, NY
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- 784
On a related note, I have another question for you, Mark.
I've got a 2001 Silverado 2500HD 6.0/4L80E, and I noticed that sometimes, on the highway, the rpms were just a little higher than they should be. Maybe 100-200 rpm. If I let off the gas slightly the rpms would come down to where they were supposed to be.
Sometimes this would not occur.
The torque converter is locked up in both situations. If I touch the brakes to unlock the converter the rpm goes up even more.
I wouldn't worry, except I have seen the transmission temperatures go up to 200 degrees while driving on the highway, even in 70 degree weather. That seems awfully high, especially since it has the aux cooler.
I had checked it, and there are no codes.
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