Discussion Starter · #1 ·
1988 MB 300E, Auto, 114k. I just purchased the car but it has a strange transmission problem. It does not slip, it just shifts high, and does not like to down shift. Starting out driving from a stop, not pushing it hard, it will rev to around 3500 rpm or more sit there for a second or two or three then shift, sometimes up one gear, sometimes up two. The actual transmission seems fine, just seems like the shifting points are out of wack, I've read about the vacuum valve on the modulator valve? Also when giving it good amount of gas it doesn't like to down shift, sometimes it will, other times it will downshift and catch at about 5500 RPM's. Any ideas before I take it in? BTW the fluid looks new, but I'll change it with filter anyways this week. I've played around with the transmission cable near the throttle body with no luck.