Ever since I replaced the injectors on my 1984 300D with knowed good running set from a 1985 300SD. The transmission now shift hard, like being in "N" on high rpm and popping it in drive hard shifting. Down shifting is the same, as I approach a light to stop it feels like someone rear ended me. Any suggestion where to start looking.

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1984 300D, 1972 LT1 Corvette, 2014 Artic White 3LT/Z51 C7, 2013 650i Convertible BMW, 1994 Kawasaki Vulcan, 1992 Yamaha Seca II and 1996 Dodge Ram 2500.