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  #1  
Old 11-20-2001, 04:15 AM
kcn
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Tranny won't shift without letting up

My 77 300d will not shift unless I drive to red line, then let off the gas. I fixed a leaky tee, which solved the engine run-on, but still have this shifting problem. Where do I start? Vacuum to the tranny? I've read many threads leasing me to assume a faulty modulator. This is a w123 chassis, 195k miles.
Craig N
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Old 11-20-2001, 11:59 PM
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I would check to see if the bowden cable is stuck or stretched.
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Old 11-21-2001, 04:04 PM
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The 1977 300D should have only 1 rod from the transmission that controls the shift. ADJUSTING this rod should help the shift problem, make the rod longer where it connects to the accelerator linkage.
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  #4  
Old 11-23-2001, 01:04 AM
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I have a 1981 300d that was shifting late in all gears and my problem was a vaccuum switch on top of the valve cover. There are 3 of them under a black cover. There is a connector to them. The one to the tranny was bad. The part number for mine is 0029975336
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