transmission not going into overdrive

CHEVROLET VENTURE
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KMCGLAUN
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we have a 01 chevy venture 3.4 liter 123000 miles the transmission is changing fine but is not going into overdrive it starts making a whinning noise but when you let off the accelrator the nosie stops and when you accelerate again the noise starts back any ideas what we need to do.
Apr 19, 2007 at 8:17 PM
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2CARPRO JACK
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Im not a transmission guy, but I would have that looked at soon. They are hydraulic units and when they begin to have problems/make noise it needs to be seen to before it causes other damage
Apr 20, 2007 at 8:08 AM
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KMCGLAUN
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so you don't think that flushing the transmission and changing the filter will help the problem
Apr 20, 2007 at 5:22 PM
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JBWMS
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I have a 2001 Venture doing the same thing. What did you do? Did you have a good result?


[quote:59f458c04e="kmcglaun"]so you don't think that flushing the transmission and changing the filter will help the problem[/quote:59f458c04e]
Oct 22, 2007 at 10:07 AM