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on 5/11/2002 5:28 PM, Jim Adney at jadney@vwtype3.org wrote: > My 71 did something like this at the same speed. It seemed like it was just > kind of bouncing back and forth on the combined backlash of everything in > the drive train. Yes, I think you have hit the nail on the head! That is what it seems like, more something going on somewhere between the gearbox and wheels, rather than the engine. > The biggest improvement came with going over the CV joints and replacing > all the loose ones with tighter ones. I even rebuilt the tranny in the hope > that > tightening up the 3rd gear on its shaft (it has some axial play, constrained > with a spring) might also help; it did, but only a tiny bit. I will check that out- I haven't had the joints out yet, so they could probably do with a check out. I have never had a tranny apart, and they look complicated in the books. Are they really that bad? > I worked over the FI, too. But I don't think I ever noticed any improvement > from that area. I believe yours is carbed, right? Yes. > I don't think I've ever heard of another one that did this, and perhaps your > symptoms are actually different, but this makes me wonder if there was > some kind of resonance at work here.