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87 300SDL suddenly won't upshift from 1st
Hey- I am new so please forgive any faux pas-After fueling up, suddenly would not upshift, but if moved to neutral after reaching shift point or higher rpm would slip into higher gears upon shifting back into D- your manuals on this subject seem to only cover diesels up to 1985- can you direct me to appropriate manual/technique/parts/etc I am guessing vacuum trouble but know nothing more on subject- thus I would also like a primer on the vacuum system in general-Thanks!
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84 300D same problem
I have the same problem. The car has 4 gears and is supposed to start in 2nd. My car starts in first but will not shift to second unless I shift to N then back to D. The problem seems to change with out side temperature. This winter I unhooked the bowden cable and my car now starts in 2nd and shifts through all gears. However this will make it shift through all the gears very fast. I manually shift through gears if I need to go quickly. I plan to hook up the cable in warm weather and adjust it to be loose. You might try to loosen it or pull it off the throtle link and see what happens.