w114 transmission shifts - Mercedes-Benz Forum

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post #1 of 4 (permalink) Old 05-25-2014, 12:11 PM Thread Starter
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w114 transmission shifts


Drove the car today after rebuild and put some fresh gas in there. one thing i have noticed is the shifting of the engine. for example, i press the gas goes to about 3.000 rpms, if i hold it there it will not shift. if i just let it go a little bit it will shift just fine, same with the final gear. carbs were rebuild and i have changed bushing on the gear shift linkage, when i took the transmission out, this bushing was not there. my question is: where do i adjust the shifting of the car, i think it needs to shift a little bit sooner. thank you.

Here is a pic of the car being outside after 6 months.
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post #2 of 4 (permalink) Old 05-25-2014, 03:24 PM
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Congratulations on getting it running and driving. Can you adjust the linkage by turning the rod in or out a bit? I'm sorry I don't know much about W114's, as you know. I believe my 107's have an adjustment so I think these might also. Another thing to check is to see if you have a vacuum leak.
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post #3 of 4 (permalink) Old 05-25-2014, 08:01 PM
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I can also only speak from early 107 experience. My 1973 450sl would go almost to the redline at full throttle, but after tackling some vacuum leaks it would not rev as high. It wasn't too far off spec, and I tried a few things to get it to rev higher but never seemed to get anywhere with it. There were apparently three control Inputs to the d-jet 1973 450sl 3-speed (different than your car, I know):

1) throttle position sensor (I adjusted with no affect)
2) vacuum modulator (I never adjusted mine because it appeared to be in the stock position)
3) kickdown switch under the gas pedal.

I realize that most likely none of this applies, but maybe it is worth something. I'm interested to hear.

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post #4 of 4 (permalink) Old 05-26-2014, 10:11 AM Thread Starter
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Thank you guys,
I adjusted the throttle control linkage and it shifts better. Not perfect but better and it can not go any further. I did notice there is another adjusting point at the bottom on the actual linkage going to the transmission. I will tackle that next, once the engine cools off.

Vacuum is good as it has all new lines, gaskets, hoses etc etc.
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