Research the blue ufo and associated vacuum plumbing. There is also a
modulator on the tranny that can be adjusted, but fundamentally the blue
ufo's job is to soften the shifts at less than full throttle (or cold) by
altering the vacuum signal to the tranny, and therefore the transmission
clutch pressure. So be sure it is hooked up correctly to the injection and
vacuum pumps etc. All the ports on it are marked.
On Aug 8, 2017 11:55 AM, "Kaleb C. Striplin via Mercedes" <
> You have a vacuum hose loose somewhere
> Sent from my iPhone
> > On Aug 8, 2017, at 1:46 PM, Craig via Mercedes <email@example.com>
> > In our '90 E300D, I have noticed the shifting varies from hard to REALLY
> > hard. I would think this is not good for things.
> > It doesn't bother me if I remember to have my head pushed back into the
> > headrest, but I wonder what it is going to the flexible couplings and the
> > other things in the driveline. In going up the mountains between here and
> > Albuquerque, if I use the kickdown switch to go to third gear from
> > fourth, when it does upshift when the slope decreases, there is a loud
> > CLUNK from the rear end.
> > Sometimes in going from first to second, it will chirp the tires. It was
> > particularly exciting one time making a left turn on rain-slicked streets
> > when I wasn't expecting it. That broke the whole rear end loose and
> > required some speedy skid correction.
> > Will changing the transmission fluid help this?
> > Is there any adjustment for this?
> > Thanks,
> > Craig
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