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Old 06-14-2018, 07:53 PM   #5
YoungPup1977
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Join Date: Jun 2015
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Re: th400 won't 2-3 upshift at WOT

Quote:
Originally Posted by mattfranklin View Post
I had a problem once with a vacuum line leaking on a TH400, but that caused high-revving shift problems at part throttle, too.
Thats a great point, always look at the easier things before dropping the pan....check the vac lines for any leaks, maybe run a separate vac line first to see if its that.... GOOD LUCK !!!!
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