Do I need to drop the transmission in order to replace the vacuum modulator valve on a 1993 190e 2.6L. .
Also, the car engages hard when the shifter is moved to D (for Drive) from any other gear and I feel that it takea a split second to engage noticed by a late engagement after I push the gas (I hear a hrash click (it just doesn't feel right). Is this a tranny issue or differential or drive shaft? Any help would be appreciated. Tranny fluid and filter was changed.
Any help would be appreciated.
Thank you all..

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Meza
1993 190E 2.6
Advanced Diesel Systems Test and Research Engineer