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Old 03-22-2008, 09:58 PM
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Join Date: Jul 2007
Posts: 32
only a second before 3rd gear

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.
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Old 03-22-2008, 11:03 PM
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
You are referring to a common problem in older transmissions called "flaring". It's quite common on the 2-3 shift. The first line of attack is to attempt to reduce vacuum slightly to the VCV. Do a search on my name and "VCV" and do some reading on how to accomplish that.

That should solve your problem temporarily............and, if not, the Superior shift kit has shown to provide significant relief for this issue.
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Old 03-23-2008, 02:29 AM
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Join Date: Jul 2007
Posts: 32
Thank you sir. Much obliged.
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Old 03-23-2008, 02:30 AM
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Join Date: Jul 2007
Posts: 32
Thank you sir, much obliged.
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Old 03-23-2008, 04:12 PM
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Join Date: Sep 2001
Location: central Texas
Posts: 17,277
Try a can of Trans-X....
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