The governor pressure isn't bleeding off as designed. When you aren't moving the governor pressure should be "0"psi & the reverse lock-out piston should return allowing the gearshifter to go back to park. YOU have a valve body problem in the trans!
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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
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44 years foreign automotive repair
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190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
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