"Hard" shift in automatic transmission

I recently bought an '85 280SE w126. I believe that the change of gears is quite noticable. It actually feels like a "hiccup" in the car when
accellerating slowly through the gears. How bad is that, and what can be done?
Gunnar Mercedes newbie...
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On Wed, 17 Nov 2004 21:49:05 +0100,
had to open a new box of zerones to say:

A "firm" shift was standard issue with MB transmissions of that vintage... Earlier models had an even more pronounced shift cycle, which left new MB owners convinced their transmission was faulty... Not so, said MB, it's the way it's supposed to be... If the shifts are accompanied by slippage or mechanical noise, it may be time to have the transmission checked... Lacking those symptoms, leave it alone...
<! -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- > zenit
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Change that little vacuum hose by the transmussion modulator... you got vacuum leak.
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It SHOULD shift softly with light throttle and harshly with wide open throttle.
The softness of the shift is dependent upon the amount of vacuum supplied to the transmission's shift modulator. Lots of vacuum = soft shifts and no vacuum = hard shifts.
Your car may have:
a broken or disconnected vacuum line to the shift modulator, or
incorrect vacuum being supplied to the transmission shift modulator, or
a broken transmission shift modulator.
Any of these is a relatively simple, and not expensive, repair. M-B didn't sell these cars to shift harshly, even in the '80s.
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check gearoil
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