85 300sd shift problems... - PeachParts Mercedes-Benz Forum

85drtysthbenz · #1 11-08-2003, 11:24 AM

im having a problem with my 1-2 shift point...at WOT,it only reaches 20mph and 3400 rpm before shifting...my thoughts are that it should shift at 30mph and at 4500rpm,or the same point all the other gears change....btw my car is an 85 300sd...heres a link to a thread i started yesterday...i figured i would post it here,and see what a tech thought...ALSO,first gear is the only affected gear,all others shift correctly

http://www.peachparts.com/shopforum/showthread.php?threadid=79128

stevebfl · #2 11-08-2003, 11:30 AM

There is an adjustment on the valve body for first gear. Thats about all I can tell you without looking at one again. I have only used it once and that was on my 1984 928 Porsche which uses the same basic 722.3 trans.

85drtysthbenz · #3 11-12-2003, 02:19 PM

steve,do you by any chance know what this adjustment is called...ive been trying for a while to find it on the internet,with no luck....all adjustments that i can find affect all gears...

haasman · #4 11-12-2003, 03:04 PM

You might want to visit this site:

http://www.mercedesdismantlers.com/diesel_vacuum_system

Be sure to follow the links also at the bottom of the page.

Haasman

stevebfl · #5 11-12-2003, 05:39 PM

The adjustment is called the full throttle control pressure adjustment. The picture is on the last page of document RA27.03-7-2204-00x

This can be viewed on the www.startekinfo.com site (I think)

haasman · #6 11-12-2003, 05:45 PM

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