BenzWorld Senior Member
Date registered: Jan 2005
Mentioned: 0 Post(s)
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RE: Shifting issue in my 76 300D
Check ALL the vacuum lines to the auto,check your linkage for excess play and replace any worn bushes.That will assist in making it change into top.Try pulling the fuse for the kick down,It won't kick down,but if the switch is stuck it will change into top.
Modulator has a vacuum line running into it,theres a plastic cover,you need to clean it first with brakeclean aerosol,remove the cover and there is a key like thing under it.you turn it clockwise or counter clockwise to soften shifts or make them harder.But it is a last resort.fix the vacuum lines etc first.