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08-18-2007, 07:31 PM
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#1 | |
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AF Newbie
Join Date: Jan 2004
Location: Newark, Ohio
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1988 celebrity not down shifting
Vehicles not down shifting all the time, from 3rd to second gear. vehicle only has 102k.
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08-20-2007, 02:28 PM
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#2 | |
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AF Newbie
Join Date: Feb 2007
Location: Montgomery, Alabama
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Re: 1988 celebrity not down shifting
May not be the same electronic transmission as the Chevy in this link, but it is probably time to take it to a garage. Don't worry, it is not always a serious problem. Let us know what you find out.
http://autorepair.about.com/library/faqs/bl295e.htm |
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09-13-2007, 02:06 PM
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#3 | |
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stupidity should hurt
 
Join Date: Aug 2004
Location: Flint, Michigan
Posts: 10,129
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Re: 1988 celebrity not down shifting
Most likely your downshifting problem is a bad vacuum modulator, or a bad vacuum supply line to it. If it will downshift manually, then the modulator valve/vacuum leak is the issue.
__________________
 Still waiting for the "good old days" I'll get to bore my future grandchildren with! |
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12-12-2007, 06:29 PM
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#4 | |
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AF Newbie
 
Join Date: Oct 2007
Location: Lockwood, Missouri
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Re: 1988 celebrity not down shifting
Just wanted to ask if the 3-2 downshift was the only symptom you noticed? Is the trans showing any other differences? Also, I believe you said it wasn't downshifting all the time. Sometimes it works properly? If not all the time is there a pattern such as " works cold and not hot" or the other way around?
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KCMike ASE Automobile Master Technician L1 Advanced Engine Performance Certified http://www.automotiveresource.org |
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