Hoping to get some direction from some members with more experience with this than I. I recently acquired a '78 D150 with a mild 360 that I have been sorting out. When I got it, it had a Summit 650 with a totally mis-adjusted TV linkage. I don't believe it was run long this way, but it now has a TQ with properly set-up linkage. Fluid checks fine. It runs well and the trans shifts very well and at the right points, however.... Primarily when warm, I am getting a "bang" or "klunk" coming off idle such as when pulling away from a light. This does not occur all of the time, but enough to be concerned. The truck will start to move, and then the noise. It almost feels like it is slipping before engaging. I have been thru the driveline and all u-joints and rear are play free. It almost seems pressure related. I haven't touched the bands because it seems to shift and work so well otherwise. Any ideas where to look?