my trasmission starts loosing power and starts smoking over 30mph.I just picked it up from a mechanic who put in new seals what could it be

Asked by May 15, 2013 at 11:44 PM about the 1977 GMC Sierra

Question type: Maintenance & Repair

1 Answer

195

what kind of trans is it ? was it working before the seal work ? info ?? std, auto, auto with OD. Did the mechanic put the trans in the Truck or did you? Did someone hook up everything, no leaks or fluid toped up, fluid not over full.

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