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Old 01-27-2004, 07:24 AM   #1
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1994 36' Classic 36
North Charleston , South Carolina
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Tranny Shift

My 1990 33 LY seems to be shifting incorrectly.

It was shifting okay until the other day when I took it to town to have it compounded and waxed.

I have been underneath the doghouse working on belts. Maybe I loosened something up inadvertantly.

It seems that the engine is revving up way to high before the transmission shifts to the next gear.

Is it possible that I have a vacuum leak somewhere?
What tells the transmission to shift in a timely manner?

I am assuming that the Tranny shifts when a ceratin level of vacuum is reached by the intake.

Please advise,
Smily
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Old 01-27-2004, 07:40 AM   #2
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What tranny? Some are electronic, some vacuum/governor.

John
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Old 01-27-2004, 07:41 AM   #3
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1978 28' Argosy 28
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Ken,
Depending on the exact model there is a vacuum line that runs from the intake manifold to a valve on the side of the transmission. If the line is cracked or has come off you will have wonky shifting. I would start there. I have replaced most of my vacuum lines, but I have fewer lines than you do.
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Old 01-27-2004, 07:45 AM   #4
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1994 36' Classic 36
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Tranny type

Umm, only description I can give at this time is, Chevrolet, no overdrive, 454 engine and 1990 model.

All I know from here. I can ook at book later.

Smily
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Old 01-27-2004, 07:47 AM   #5
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1978 31' Sovereign
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Each year unique?

The only outside signal going to my tranny is (I think) an electric signal originating from a full throttle situation which precipitates a downshift. The Xeppelin has a fairly harsh shift it it shifts under a load.
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Old 01-27-2004, 08:03 AM   #6
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1978 28' Argosy 28
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I know Fred (1985AIR345) had the same type of symptom. He had a bad vacuum line and he had the same type of problem.
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