i have a 1986 300e with a 722.3 transmission. I have a fairly good upshift from second to third but i seem to have a very late upshift to fourth like it won't happen until 3500+ rpm. Just recently i replaced the vacuum modulator and the new modulator holds vaccuum and receives good manifold vacuum. I have made some cable adjustments which helped to bring the 2-3 upshift back into the proper range but they did not seem to affect the 3-4. does anyone know of a good printed or electronic transmission manual that could help me troubleshoot this tranny? i have the microfiche but they are unbearable to work with and very hard to read. the transmission shifts firmly into third but late into fourth but i get a good shift when finally occurs
HELP
MIKE

If the transmission has a long 2 -3 and or 3 – 4 up shift at light and partial throttle, the K1 and /or K2 clutches are slipping, do to excessive clutch clearances on high mileage cars.

Its not that the duration of the shift is excessively long but rather the timing of just the 3-4 shift is late and sometimes allows the engine to rev to redline before allowing the shift to occur. The quality of the shifts themselves once they happen are very good quick and firm no flaring slipping or anything like that. I currently have removed the valve body and i am checking for dirt build up and worn parts because the microfiche service manual that i have said that might be an issue. I will let you know how i do. Could the k1 band not be engaging at that giving me this problem as well thanks
MIKE

Full throttle kick down up shifts are the only time any up shift should happen at red line or just below. From your description the 3-4 up shift is a slip. The K1 and K2 are clutch drums

There are MB valve body up date springs for a delayed 3 -4 up shift. I need the all of the numbers stamp on the passenger side transmission rail, just above the pan. To see if it applies to your transmission

i was finally back underneath the car but i forgot to get the numbers off the side i will ge that as soon as possible thanks for your help
MIKE

124 270 06 01 722 320 02 810116 is the number posted on the side of the transmission casing. I did some testing and found that i have no governor pressure intermittantly. What i mean is when the upshift doesn't happen the pressure gauge doesn't move but when the pressure gauge moves (which was rare on a 10 min or so test drive, the pressure was within parameters (greater than .5 bar at 30 kph) I think i should add that i have been trying to remove the governor on my 1986 300e and not having much luck. I pulled off the cover and have the removed the support so the tranny is lower. the problem is i can't release the governor retainer because i can't find it. What i understand is that it should either be a lock nut on the passenger side of the tranny, which isn't there, or it should be a clip in the drivers side, which i can't see if it is there or not. do i need to pull the pan down? i also found a great link which has a sort of transmission manual posted in pdf for the 722.3 /4/5 http://transmission.articles.mbz.org/akp722.pdf
thanks in advance for any help
MIKE