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Old 08-05-2008, 12:07 PM   #1
faribran
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Join Date: Jul 2005
Location: AL
Posts: 1,828
tranny problem

i have a 2000 GMC 1/2 ton truck with auto overdrive..
the problem i am having is... at cruise speed the transmission will shift up and down... doesnt seem to be slipping... but maybe the lockup is going in and out.... anyone here have any ideas.... plz
thanks
Rich
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