Found a beautiful Super 88 - after owning about a week, on a cruise on a deserted country road, decided to "open it up" & see how it would accelerate .. accelerated fine BUT accelerator stuck full open .. initially applied brakes; that didn't help .. as I'm gaining (too much) speed, I shifted from Drive to Neutral .. that created alot of "racket" & I decided that wasn't good (in hindsight that may have been fan belt screeching), so then shifted back to Drive & that seemed to go okay .. then decided to reach down and "unstick" the pedal .. that worked, but the pedal came off in my hand, but I was able to slow the car down & got it home okay .. (pedal on order) .. the next day trans seemed fine until cruising in 4th gear (acceleration through all four gears is fine) at stable throttle, there is a subtle "lurching" in the drivetrain which I would guess is something amiss with 4th gear .. would appreciate your thoughts .. trans was overhauled during restoration 20 years ago, but has minor miles since then .. thank you