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[W123] 1984 300D Shift Problem
Hey guys,
I recently acquired a 1984 300D (auto transmission) that will not shift into gear. Shifting between park and neutral is no problem which makes me think it isn't a gear selector issue but I could be wrong. Could this be a vacuum issue? I know the car does have a vacuum leak because it shuts off very slowly. I have looked around online a good bit for answers but it seems like everybody's issue is a little different! I'm not really sure where to start troubleshooting this problem so I'm hoping you guys can point me in the right direction. Thanks! Last edited by bretbmorgan; 02-22-2019 at 04:32 PM. |
#2
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Are you saying that the shifter will not move or that the tranny will not shift when you try to drive? Need a bit more information. Does it drive at all?
If it is slow to shut down, you may have a shutoff valve problem. Shutoff valve is in the rear of the injection pump and has a nipple with a vac line. You can pull off the vac line, attach a Mityvac, and see if it will hold a vacuum; if it does not, it is bad and must be replaced. Then again it could just be a leak in that vac line or rubber connector (easiest fix). Also make sure that your shutoff lever is all the way up; if it is partially down, it would affect your shutdown. This pic shows the location of the shutoff valve in my 300SD; assume yours would be in the same place. Last edited by tyl604; 02-22-2019 at 01:53 PM. |
#3
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The shifter moves fine but the car will not go into drive nor reverse. The car does not drive at all because I can only go into park and neutral.
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#4
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Quote:
1) Ensure that the entire driveline is intact: transmission, shift linkage, flex discs, drive shaft, differential, half-shafts. 2) Ensure that there is fluid in the trans, and at the correct level. If 1 & 2 are satisfied, there may be a failed front pump in the trans, or a valve body fault. Note: Unless the transmission has been changed to something non-MB, it has four forward speeds, no overdrive. |
#5
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Odd; I do not see the pic that I attached.
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#6
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Take a look at the bushing under the shifter that is a pivot point to the trans. Make sure it's in good shape..Cheap fix.
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