|
|
|
|
|
#1
07-29-2011, 08:48 PM
|
||||
|
||||
|
617.952 722 AT no load downshift
Hi,
Both my 81 and 82 have a somewhat hard upshift. I like it that way and as I understand, it's actually better for the trans. The odd thing on my 82 is that when I'm coming to a stop, no load, I oftentimes hear, and sometimes actually feel the trans clunk through the gears as it goes back. While I have heard very quiet flunks in my other w123 cars, in the 82 it is really pronounced and as mentioned, can be felt a bit... The trans shifts and operates well, has seen regular service, has full fluid, and I have no reason to think anything the matter with it. However this is noticeable... Should I be concerned?
__________________
Current Diesels: 1981 240D (73K) 1982 300CD (169k) 1985 190D (169k) 1991 350SD (116k) 1991 350SD (206k) 1991 300D (228k) 2008 ML320 CDI (199k) 1996 Dodge Ram CTD (442k) 1996 Dodge Ram CTD (267k) Past Diesels: 1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k) 
|
|
#2
07-29-2011, 09:39 PM
|
|||
|
|||
|
It sounds like your modulator pressure is set to high.
If you shift to neutral, like I have to do on wifes car, it won't do it. ;-)
__________________
James Marriott 2003 Buick Regal 1983 300D (228k, frau Auto) 1996 Suburban K2500 (192k, 6.5 turbo diesel/4WD towmaster 10,000) www.engineeringworks.biz 1987 300SDL junker 170k 1982 300SD junker, 265k
|
|
#3
07-29-2011, 10:20 PM
|
||||
|
||||
|
You could be losing vacuum. The tranny bleeds off vac for the upshift but needs vac for downshifts. Take a look at the vac system.
|
|
#4
07-29-2011, 11:26 PM
|
||||
|
||||
|
vac is fine and holds...
is the modulator mentioned the vacuum modulator? Could the two posts be saying one and the same thing?
__________________
Current Diesels: 1981 240D (73K) 1982 300CD (169k) 1985 190D (169k) 1991 350SD (116k) 1991 350SD (206k) 1991 300D (228k) 2008 ML320 CDI (199k) 1996 Dodge Ram CTD (442k) 1996 Dodge Ram CTD (267k) Past Diesels: 1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)
|
|
#5
07-29-2011, 11:54 PM
|
||||
|
||||
|
Mine started clunking on the Down Shift after I had changed the Oil Filter Housing Gasket.
It turned out I dislodged the Vacuum Line going to the Modulator. After reconnecting it the down shifting returned to normal. A cracked Modulator Cap will also cause a Vacuum leak.
__________________
84 300D, 82 Volvo 244Gl Diesel
|
|
#6
07-30-2011, 12:35 AM
|
||||
|
||||
|
I dont have any leaks in the interior systems like door locks and seat backs... Bt I guess they are on the other side of a check valve, right?
Ill try to do a vac test on the AT line to see what I get.
__________________
Current Diesels: 1981 240D (73K) 1982 300CD (169k) 1985 190D (169k) 1991 350SD (116k) 1991 350SD (206k) 1991 300D (228k) 2008 ML320 CDI (199k) 1996 Dodge Ram CTD (442k) 1996 Dodge Ram CTD (267k) Past Diesels: 1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)
|
|
#7
07-30-2011, 01:45 PM
|
||||
|
||||
|
If you leave it shifting hard - I believe you'll be promoting damage to the splines in the front planet gear assembly.
Take a look at this thread http://www.peachparts.com/shopforum/showthread.php?t=299729 And follow the link in post one to see what happens if they "go" http://www.peachparts.com/shopforum/showthread.php?t=297960
__________________
1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior  Don't leave that there - I'll take it to bits!
|
 |
| Bookmarks |
|
|
Linear Mode
