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Old 03-19-2015, 02:37 PM
j cAT j cAT is offline
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Re: 4l80e no upshift 1995

Quote:
Originally Posted by Vanfan View Post
Replaced the ignition switch and neutral safety switch, replaced both the batteries and cleaned all the grounds. Still wont upshift. not throwing a check engine light anymore either
ok so now , no codes same no upshift you replaced both the a/b valves ? how does it start now ? check for proper voltage at the tranny check the tranny electrical connector .
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