Howdy Bio, I'm pretty sure you are way ahead of me on this one, but here goes: When I bought my wife's 300SD a few months ago, it had a terrible 3-4 slip. Probably why the price was so reasonable. Got it home and gave the Bowden cable a couple of turns and it shifts like a dream. I really expected to have to do more, but that's all it took. Maybe you could be so lucky.

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John Schroader
bio burnin' 83 300D, '83 300 SD, '79 240D
"I've never met a man who was good at making excuses who was good at anything else" Ben Franklin
"You cannot permanently help a man by doing for him what he could and should do for himself" Abraham Lincoln