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68 RFE cold shifting

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Old 01-04-2016, 10:42 AM
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68 RFE cold shifting
Hello all , and thanks in advance for the insight. I have recently bought a 09 DRW 3500 with a 68RFE. When cold it doesn't up shift thru all the gears for a mile or so. It seems to stay in 4 gear or so at 60 MPH taching about 2K RPM. Is this normal? Thanks again.
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Old 01-04-2016, 11:21 AM
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Yes, that is normal. I think the engine needs to be something like 120F before it is allowed to shift into the overdrive gears...
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Old 01-04-2016, 01:34 PM
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Thanks for the info.
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