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  #1  
Old 03-28-2006, 01:38 AM
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300SD vacuum issues

Hi, I know its late but if anyone can help me I would appreciate it. I have an 84 300SD. I just had the transmission rebuilt ($$$) but it doesn't shift properly. The first shift from 2-3 is hard and sometimes flares. The next shift, 3-4, is usually smooth.
I've read a lot of the threads and DIY on the trans and vacuum but what I really need is a photo of the vacuum lines on an 84 300SD. I think they may be mixed up. Can anyone help me out?
Thank you
Izick
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  #2  
Old 03-28-2006, 04:35 AM
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I dont have pics of your specific model but maybe this pictorial will help you sort some basics.

http://dieselgiant.com/mercedesvacuumtroubleshooting.htm
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Old 03-28-2006, 09:07 AM
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You should be able to find your diagrams here:

Vacuum Diagrams

Danny
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Old 03-28-2006, 09:23 AM
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This is the vacuum diagram for your vehicle:




Note that the flare on the 2-3 can be fixed by one of two approaches:

1) Reducing vacuum to the modulator via adjustment of the vacuum control valve.

2) Installing a K1 replacement piston and kit in the transmission.


Both of these will have a benefit.........the former will firm up all the shifts........the latter will simply address the 2-3.
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  #5  
Old 03-28-2006, 08:09 PM
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Thanks

Thanks guys. I figured out that the lines going into the vacuum control valve were reversed.
Thanks again
izick
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  #6  
Old 03-28-2006, 08:15 PM
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No problem, glad you got it squared away.

Bookmark that link i posted. It comes in handy often. Or go to thread tools up top in that link and subscribe to that thread.

Danny
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