From the horses mouth, from a friend who was Service Manager and Transmission specialist of a major Benz Dealership in the eighties. His simple fix was adopted by Mercedes . One drill size up for the clutch feed to 4th gear in the valve body seperated plate. Mercedes supplied a modified plate as a Service fix. I'll get the exact detail from him and post it. There is nothing new in this type of modification on other transmissions , mainly some Fords. The trick is to find the right...