I have a 98 Sable DOHC floor shift Auto. 106k miles. Runs great in 1st, 2nd, and 3rd not so good in overdrive. The problem tends to happen more when it first goes into overdrive. If on highway going down a hill, overdrive appears to be fine. Going up hill in overdrive, while under a load, approx. 2k to 2300 rpm, it appears to be slipping, jumping, surging. It did have code p1741. I removed the valve body and pump shaft. Bearings in pump were worn, shaft scared up inside of valve body hole and seals were about half gone. So I replaced valve body, pump, shaft and seals are fine. Still slips. My question is, do you think it is simply the torque converter bad or overdrive part of the actual trans bad (bands-gears, ??) I am thinking it is just the torque converter, which screwed up the pump bearing, shaft, seals and also causing the slipping. Do you think trans is fine?? Any suggestions??