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Old 03-22-2011, 04:09 PM   #1
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Default 99 SSEI Tranny Issues advice needed

Okay, so I have a p0742 code. Basically the converter is up shifting to early and down shifting to late. I had a fluid and filter change done by a tranny shop and there was some filings but not to bad. Needless to say the problem still exists. Now when I drive I shift manually and was wondering the following things. If I properly shift manually will the tranny last forever? If I get a tranny from a yard does it have to be special because of the SC and sport shift button feature? Any other advice or recommendations?

Thanks, Jack
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Old 03-22-2011, 09:33 PM   #2
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Could be a bad solenoid or a stuck valve. If you choose to swap transmissions you need to make sure it'* a 4t65e-HD If you get a 4t65e the diff is a bit smaller and the axle wont fit right.
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Old 03-22-2011, 09:50 PM   #3
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Do you also have a P1811?
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Old 03-23-2011, 08:14 PM   #4
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No P1811 and it is definitely the valve. Should I bother running some seafoam and can I shift manually forever?
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Old 03-23-2011, 08:35 PM   #5
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You can shift manually, but it'* not fixing the problem. If the valve is stuck or sticking, seafoam can work it loose. But it can also cause a transmission that is on it'* way out to finally die all together.
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