A friend of mine has a 1985 300 Turbo Diesel and has a problem with the car downshifting. The car shifts fine manually up, but when downshifting the car manually, it will not drop to S or L at any speed, unless you are almost stopped. Is this a vaccuum problem, or an internal tranny problem???? I did the search and did not find anything close to what I was looking for. Any suggestions would be appreciated. Thanks.

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85 300CD 245K Claret Red "Janis" (Joplin)
2003 379 Peterbilt Large Car
2002 Dodge Ram 4X4: Hubby Did'nt Buy the Diesel (Duh!)
Family's Previous Benz's R.I.P.
79 300SD Euro Metallic Green
77 280? Blue
74 220 Hunter Green

here's a good link for tranny info

http://www.babcox.com/editorial/ic/ic20242.htm

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1984 300D Turbo - 231k....totalled 11/30/07 RIP