I have 94 bronco with the 351 under it with the auto tranny 4speed with o/d. i have a problem with it slipping into what seems to be netural when shifting from 4th to od and sometimes before that. Stepping on it at a light the other day i hit about 30mph and it just reved up to about 4grand and would go back into gear till i came to a complete stop any ideas on what it might be. I added a little fluid to it hoping it would help, havent had much time to test it out.
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