Hello; I own a 1983 300SD Turbo Diesel with over 300000 miles but still in mint condition in and out. Just now I noticed my baby doing something funny:
When I accelerate, the automatic tranny will shift from 1st to 2nd with no problems. As I continue to accelerate, just before the tranny goes into 3rd, it makes a sound for just a second that's similar to pushing the gas pedal in neutral. Then with a bit of a jolt, the tranny shifts into 3rd. It only does this on acceleration and not every time, just so now and then. Any suggestions what that could be and how I can fix that? Thank you for your response. By the way I checked all fluid levels and they are OK.