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There is only 2 clutch packs in a 727 and the front clutch pack is your problem. It is also applied in reverse but the pressuer is much higher in reverse so it may not slip yet in reverse. Since 3rd gear uses much less pressuer then reverse it will slip in 3rd gear before it will in reverse. Ron



The front clutch pak has a seal on the piston that can be tricky to get in sometimes, I've pulled them out and part of the seal has been folded back on itself, this may have caused your problem also because you are losing pressure there.