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Failing vacuum modulator???
Interesting.
Finally decided we could fit all the gear and suitcase into the 560 for the trip to Sacramento. Then decided to make a run to the bank for some travling cash. Halfway to the bank, coming off a stop light I get a 1st gear start on easy throttle. Then it decides to hang in first gear. A couple throttle blips wont force an upshift. Coming off the next stop light I did so somewhat aggressively. That forced an upshift to 2nd. The car has been shifting fine since. The only thing I can think is that the vacuum modulator might be failing, early stages. What do y'all think? BTW, since that little first gear lock up, I have decided to take the Suburban. Really don't want to get hung in first all the way through the Central Valley.
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Mike Tangas '73 280SEL 4.5 (9/72)- RIP Only 8,173 units built from 5/71 thru 11/72 '02 CLK320 Cabriolet - wifey's mid-life crisis 2012 VW Jetta Sportwagon TDI...at least its a diesel Non illegitemae carborundum. |
#2
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Could be that the carpet is caught up in the kickdown switch or the switch is sticking.
Sixto 95 S420 91 300SE 87 300SDL 83 300SD |
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Mike
Bummer! It sounds like a vacuum modulator or possibly the rubber tubing between the modulator and the vacuum line. Hope you had a good trip never the less. Haasman
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'03 E320 Wagon-Sold '95 E320 Wagon-Went to Ex '93 190E 2.6-Wrecked '91 300E-Went to Ex '65 911 Coupe (#302580) |
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Mike,
How is it and what was it? Sixto 95 S420 91 300SE 87 300SDL 83 300SD |
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Mike, if your car has the manual select switch for first gear it could be sticking. If I remember correctly, all 5.6L MB's had this feature. With the shifter in 2nd gear, a click to the left engages first. Sometimes the switch doesn't release and causes some strange transmission behavior. Good luck
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#6
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Just got back late last night, haven't had a chance to check anything out yet though.
Yes, the 560 has the "B" switch for 1st gear lock, but I have only locked it a couple times. The most recent manual 1st gear lock was probably a couple weeks ago. Will keep that in mind if it happens again. Don't think it could be the kickdown switch because of the circumstances when the event happened. I was rolling at speed, slowed to a stop. Light went green and I gently accelerated and made a right turn. That gentle accel caused a 1st gear start. Will also have to check out if I may have had a minor coffee spill right into the "B" switch. Possible a liquid short could have caused this.
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Mike Tangas '73 280SEL 4.5 (9/72)- RIP Only 8,173 units built from 5/71 thru 11/72 '02 CLK320 Cabriolet - wifey's mid-life crisis 2012 VW Jetta Sportwagon TDI...at least its a diesel Non illegitemae carborundum. |
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