PeachParts Mercedes-Benz Forum

PeachParts Mercedes-Benz Forum (http://www.peachparts.com/shopforum/)
-   Diesel Discussion (http://www.peachparts.com/shopforum/diesel-discussion/)
-   -   Transmission trouble 1985 300SD (http://www.peachparts.com/shopforum/diesel-discussion/352171-transmission-trouble-1985-300sd.html)

triacon 03-10-2014 07:00 PM

Transmission trouble 1985 300SD
 
My 1985 300SD shifts ok up to 3rd gear, but i have to do the following for it to get into 4th.... while driving, if i put the car in N, let the rpms go down a bit and then put it back into D. Hit the throttle a bit and the car is now in 4th...

How bad of a situation is this?

cho 03-11-2014 10:10 AM

.

did you check kick down switch... or vacuum?
when you high rev in 3rd letting a leg back a bit doesn't help ?


cheers

triacon 03-11-2014 07:09 PM

is the kick down switch under the pedal? or is it on the engine?
No I have not checked vacuum yet. Not sure where to check first.
I do have a mighty vac and I do have a separate vacuum gauge.
Point me to the proper DIY Vacuum check and I will try to do it.

backing off the throttle while in a high rev, in 3rd, doesn't help, but putting the car in N, watching the revs drop to about 1000, then shifting back into D works...

cho 03-12-2014 04:40 AM

.

yes under throttle pedal.

search PP forum will give you plenty to start with, considering
vacuum issues and modulator adjustment which may or may not be needed.
also info considering K1 kit might help....but your problem is kind of strange
so I will go with first usual suspects like kick down,vacuum...etc

cheers

SD Blue 03-12-2014 09:38 AM

It's a long one but try this thread for all the information to adjust vacuum for the transmission:
http://www.peachparts.com/shopforum/diesel-discussion/158216-its-critical-how-you-set-your-transmissions-vacuum-system-your-diesel-mbz.html


All times are GMT -4. The time now is 08:55 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website