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Old 04-24-2013, 10:35 AM
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fresh 700R4, lost reverse only after 50 miles-

I hope someone may have an answer or suggestion, 1987 700R4 recent rebuild with all the good parts from PATC including new converter, built by GM transmission man with 25 + years experience. It has him stumpped at the moment too;
installed tranny with new converter(fluid in converter from start), did proper adjustment of TV cable, added 4qts, started engine, added 4 more qts. ran thru all gears, up to temp., checked fluid and topped off to full. road tested and shifted great in all gears. 50 miles on trans and lost reverse. 1st, 2nd, 3rd & OD work great. it feels like it wants to go in reverse, rpm's even drop a little, but nothing there. checked fluid, nice and red and on full.
any ideas???

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