My truck has 112,000 miles on it. 4.4 V8 . She might be old but is in great condition. Today while driving coming to a stop sign setting with foot on brake felt like the t/c disconnected. When light turned green i stepped on throttle and engine reved and truck hesitated.. Then converter engauged and off it went.. Then again at next light except kind did the engauge disengauge 3 time very fast before it hooked up. Drove it around and no other issues, no trans error or fault lights on. Got on it hard few times and NO slipping, shifted it manually and all worked perfrectly. seemed like once oil was hot and up to temp th problem was gone. Almost feels like its slightly low on oil? Course ya cant check it no dip stick... any thoughts ??