Here goes-- Just got my K5 back from re-gearing to 4.88. I had a smaller version of this problem before regearing, but now it is considerably worse. Tranny works fine driving around town in Drive, not OD. No problems upshifting or down. When I put in OD, even at 60-70 on the highway, it "stalls" in and out, and bucks like a bull. Is it possible for OD to go "bad" and everything else work OK? Possible fixes? Thanks in advance.