I have an '81 300D with over 200K on it. A while back I noticed the transmission started shifting "harder" especially between 1 & 2 and 3 & 4. It got worse until finally, nothing. I rolled off to the side of the road with the engine going strong but absolutely nothing in any gear.
I replaced the Power Brake booster vacuum line because it looked to have been repaired with electrical tape at one point. Still no go. I do notice that there is a hissing sound like air is escaping for about a minute after I turn the engine off. So, any suggestions for my next step? Thanks.

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1981 MB 300D 214K
2003 Dodge 3500 Cummins Diesel

Considering ( no offense ) you knew you had a transmission problemand still kept driving, if it was me I would have it towed to a reliable MB indy mechanic and have him tell me what was wrong.


...

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'87 924S
'81 280SEL

Sold ->

81 300SD -
93 300E w/ 3.2
85 300D-
79 300SD
82 300CD
83 300CD - CA
87 190E 5 spd
87 Porsche 924S

"..I'll take a simple "C" to "G" and feel brand new about it..."

Gisele,

At this point you may have damaged your tranny. It may be more than your vacuum system...

I would have a indy shop take a lot at it.

bsdguy

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1985 300D Turbo CA Fed 223K