Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 09-10-2012, 03:25 AM
Registered User
 
Join Date: Mar 2010
Location: Freehold, NJ
Posts: 482
1983 300SD transmission issues

I just purchased my 83 SD this week and it only has 131K. When stepping on the accelerator it takes a few seconds before she actually starts to move. My N/A 300TD takes off quicker to 20 mph. After 20 though this thing gets going.
It also seems to shift very soon into fourth gear. If I decide to manually shift her on hard throttle she shifts into 2nd well (chirps tires), when I shift her into 3rd she will just rev till I let off the accelerator a little and then bangs into gear. When I shift into 4th (D) its hit or miss when she wants to engage. When I floor it regularly sometimes it shifts into 1st in 2 seconds and sometimes not till around 40mph. The 3/4 shift is almost always within a second of each other. When shifting from drive to park it still sound like something is moving or slowing down internally before it park engages. 1-2 seconds.
__________________
1979 Mercedes 300SD 314k
1988 Mercedes 560SEL (parts car)

2002 Toyota 4Runner
1950 Packard 8
2006 Ford Ranger 4x4 (manual)
2010 Chrysler Sebring Convertible

Previous German cars-
2001 Mercedes SL500
1983 Mercedes 300SD
2011 BMW 328i (manual)
2008 BMW 535xi (manual)
2006 BMW M3 (manual)
1980 Mercedes 300TD
2006 BMW 750i
1996 Mercedes E300D
1994 BMW 740i
2006 BMW 330xi (manual)
1999 E300DT Smoke silver/black 253k
2012 BMW 535i Xdrive M-Sport
1984 300TD-T 304k
Reply With Quote
  #2  
Old 09-10-2012, 10:45 AM
Registered User
 
Join Date: Jan 2012
Location: Leiden, Netherlands
Posts: 611
Check the throttle linkage first, rubber parts can be deteriorated and the linkage may need to be greased. Check with the aid of an assistent.
Reply With Quote
  #3  
Old 09-10-2012, 04:19 PM
Registered User
 
Join Date: Mar 2010
Location: Freehold, NJ
Posts: 482
I checked all of the linkages and lines going to the tranny and everything is OK. When someone presses on the accelerator the linkages go to the max point so everything is moving properly. Any chance its the Vacuum modulator? I've heard about issues with it before? I never had any issues with the TD and the trans so this is all new territory for me.
__________________
1979 Mercedes 300SD 314k
1988 Mercedes 560SEL (parts car)

2002 Toyota 4Runner
1950 Packard 8
2006 Ford Ranger 4x4 (manual)
2010 Chrysler Sebring Convertible

Previous German cars-
2001 Mercedes SL500
1983 Mercedes 300SD
2011 BMW 328i (manual)
2008 BMW 535xi (manual)
2006 BMW M3 (manual)
1980 Mercedes 300TD
2006 BMW 750i
1996 Mercedes E300D
1994 BMW 740i
2006 BMW 330xi (manual)
1999 E300DT Smoke silver/black 253k
2012 BMW 535i Xdrive M-Sport
1984 300TD-T 304k
Reply With Quote
  #4  
Old 09-10-2012, 06:21 PM
B100
 
Join Date: Jun 2009
Posts: 206
Sorry to repeat something that already has been said, but please double check your throttle linkage and your bowden cable.

Make sure the little round roller is at this position at rest:



And that your bowden cable is adjusted so that this little tab has a slight gap here:



FYI, in this picture I am moving the linkage so that all the slack is removed and any further I pull will move the pump throttle. With slack this gap will be a little bit bigger (which can be seen in the first photo).

When I got the car, that round bushing was halfway through that slot, and the transmission was shifting a bit later than it should. After making these adjustments, the car feels "correct".

Sorry if these pictures are too large, I am at work and have no software to resize!
__________________
1984 300TD Turbodiesel - 272k
- Daily Duty

1985 300D Turbodiesel - 315k
- "Recommended for competition events only"
Reply With Quote
  #5  
Old 09-10-2012, 06:50 PM
Registered User
 
Join Date: Mar 2010
Location: Freehold, NJ
Posts: 482
The pics are AWESOME! Thank you. I will check that out later tonight after I get out of work. I love this huge pics. It only lets me load small ones. The larger pics are a plus!
__________________
1979 Mercedes 300SD 314k
1988 Mercedes 560SEL (parts car)

2002 Toyota 4Runner
1950 Packard 8
2006 Ford Ranger 4x4 (manual)
2010 Chrysler Sebring Convertible

Previous German cars-
2001 Mercedes SL500
1983 Mercedes 300SD
2011 BMW 328i (manual)
2008 BMW 535xi (manual)
2006 BMW M3 (manual)
1980 Mercedes 300TD
2006 BMW 750i
1996 Mercedes E300D
1994 BMW 740i
2006 BMW 330xi (manual)
1999 E300DT Smoke silver/black 253k
2012 BMW 535i Xdrive M-Sport
1984 300TD-T 304k

Last edited by turbozeke418; 09-10-2012 at 07:14 PM.
Reply With Quote
  #6  
Old 09-10-2012, 07:00 PM
Registered User
 
Join Date: Jan 2002
Posts: 18,355
I believe you have two issues going on. The timing of the shifts is controlled by the bowden cable. Adjusting it will adjust the timing of the shifts. The harshness of the shifts is controlled by vacuum. More vacuum, less harsh shifts. Sounds like your transmission is getting too little vacuum. You'll need to monitor the amount of vacuum going to the modulator as your drive around and shift using a Mity Vac or vacuum gauge
t'd into the modulator line, led out of the cowl and resting on the windshield so you can see the vacuum levels.
__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
Reply With Quote
  #7  
Old 09-11-2012, 01:23 AM
Registered User
 
Join Date: Mar 2010
Location: Freehold, NJ
Posts: 482
Quote:
Originally Posted by Secondaries View Post
Sorry to repeat something that already has been said, but please double check your throttle linkage and your bowden cable.

Make sure the little round roller is at this position at rest:



And that your bowden cable is adjusted so that this little tab has a slight gap here:



FYI, in this picture I am moving the linkage so that all the slack is removed and any further I pull will move the pump throttle. With slack this gap will be a little bit bigger (which can be seen in the first photo).

When I got the car, that round bushing was halfway through that slot, and the transmission was shifting a bit later than it should. After making these adjustments, the car feels "correct".
I just checked my set up and there appears to be nothing wrong with it
Attached Thumbnails
1983 300SD transmission issues-bowden.jpg  
__________________
1979 Mercedes 300SD 314k
1988 Mercedes 560SEL (parts car)

2002 Toyota 4Runner
1950 Packard 8
2006 Ford Ranger 4x4 (manual)
2010 Chrysler Sebring Convertible

Previous German cars-
2001 Mercedes SL500
1983 Mercedes 300SD
2011 BMW 328i (manual)
2008 BMW 535xi (manual)
2006 BMW M3 (manual)
1980 Mercedes 300TD
2006 BMW 750i
1996 Mercedes E300D
1994 BMW 740i
2006 BMW 330xi (manual)
1999 E300DT Smoke silver/black 253k
2012 BMW 535i Xdrive M-Sport
1984 300TD-T 304k
Reply With Quote
  #8  
Old 09-11-2012, 01:25 AM
Registered User
 
Join Date: Mar 2010
Location: Freehold, NJ
Posts: 482
Quote:
Originally Posted by kerry View Post
I believe you have two issues going on. The timing of the shifts is controlled by the bowden cable. Adjusting it will adjust the timing of the shifts. The harshness of the shifts is controlled by vacuum. More vacuum, less harsh shifts. Sounds like your transmission is getting too little vacuum. You'll need to monitor the amount of vacuum going to the modulator as your drive around and shift using a Mity Vac or vacuum gauge
t'd into the modulator line, led out of the cowl and resting on the windshield so you can see the vacuum levels.
Kerry...How do I adjust the bowden cable? Should I lengthen or shorten it? Or is it just a trial and error type thing?
__________________
1979 Mercedes 300SD 314k
1988 Mercedes 560SEL (parts car)

2002 Toyota 4Runner
1950 Packard 8
2006 Ford Ranger 4x4 (manual)
2010 Chrysler Sebring Convertible

Previous German cars-
2001 Mercedes SL500
1983 Mercedes 300SD
2011 BMW 328i (manual)
2008 BMW 535xi (manual)
2006 BMW M3 (manual)
1980 Mercedes 300TD
2006 BMW 750i
1996 Mercedes E300D
1994 BMW 740i
2006 BMW 330xi (manual)
1999 E300DT Smoke silver/black 253k
2012 BMW 535i Xdrive M-Sport
1984 300TD-T 304k
Reply With Quote
  #9  
Old 09-11-2012, 07:12 AM
Registered User
 
Join Date: Jan 2002
Posts: 18,355
Quote:
Originally Posted by turbozeke418 View Post
Kerry...How do I adjust the bowden cable? Should I lengthen or shorten it? Or is it just a trial and error type thing?
There's a threaded portion with a nut where it terminates at the valve cover. I can't remember which way to change it to move the shifts in which direction? There are threads here.
__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
Reply With Quote
  #10  
Old 09-11-2012, 09:18 AM
toomany MBZ's Avatar
Registered User
 
Join Date: Nov 2006
Location: central Va
Posts: 7,820
To extend the time the gear stays before upshifting, ON MINE, loosen the white nut.

Video pending.
__________________
83 SD

84 CD
Reply With Quote
  #11  
Old 09-11-2012, 10:25 AM
toomany MBZ's Avatar
Registered User
 
Join Date: Nov 2006
Location: central Va
Posts: 7,820
Bowden cable on MB transmission, 722.303 - YouTube
__________________
83 SD

84 CD
Reply With Quote
  #12  
Old 09-11-2012, 01:10 PM
Registered User
 
Join Date: Mar 2010
Location: Freehold, NJ
Posts: 482
Quote:
Originally Posted by toomany MBZ View Post
AWESOME!
__________________
1979 Mercedes 300SD 314k
1988 Mercedes 560SEL (parts car)

2002 Toyota 4Runner
1950 Packard 8
2006 Ford Ranger 4x4 (manual)
2010 Chrysler Sebring Convertible

Previous German cars-
2001 Mercedes SL500
1983 Mercedes 300SD
2011 BMW 328i (manual)
2008 BMW 535xi (manual)
2006 BMW M3 (manual)
1980 Mercedes 300TD
2006 BMW 750i
1996 Mercedes E300D
1994 BMW 740i
2006 BMW 330xi (manual)
1999 E300DT Smoke silver/black 253k
2012 BMW 535i Xdrive M-Sport
1984 300TD-T 304k
Reply With Quote
  #13  
Old 09-11-2012, 02:13 PM
TnBob's Avatar
Registered User
 
Join Date: Dec 2009
Location: Shelbyville, Tn
Posts: 1,907
Common enough issue with such a great response this should be made a sticky !!
__________________
1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."
Reply With Quote
  #14  
Old 09-11-2012, 02:14 PM
toomany MBZ's Avatar
Registered User
 
Join Date: Nov 2006
Location: central Va
Posts: 7,820
Thanks turbozeke, BTW, that's a 13 mm wrench.

I had to turn it in more, trial and error. It shifts from third to fourth at ~3800 rpm, so I'll back it out a bit more.
__________________
83 SD

84 CD
Reply With Quote
  #15  
Old 09-11-2012, 03:22 PM
Registered User
 
Join Date: Mar 2010
Location: Freehold, NJ
Posts: 482
Quote:
Originally Posted by toomany MBZ View Post
Thanks turbozeke, BTW, that's a 13 mm wrench.
I didn't do anything other than have a problem lol. My bowden cable adjusts very easily with just my fingers. I turned it all the way in and it shifts smoother and at lower rpms. I had to go to work so I just left it and when I get home I'll play with it a little more. I guess I'll eventually find that "sweet spot". Thanks again for helping me out in addressing the issue. Now on to the sluggish start. I'll continue that though in the other post.
__________________
1979 Mercedes 300SD 314k
1988 Mercedes 560SEL (parts car)

2002 Toyota 4Runner
1950 Packard 8
2006 Ford Ranger 4x4 (manual)
2010 Chrysler Sebring Convertible

Previous German cars-
2001 Mercedes SL500
1983 Mercedes 300SD
2011 BMW 328i (manual)
2008 BMW 535xi (manual)
2006 BMW M3 (manual)
1980 Mercedes 300TD
2006 BMW 750i
1996 Mercedes E300D
1994 BMW 740i
2006 BMW 330xi (manual)
1999 E300DT Smoke silver/black 253k
2012 BMW 535i Xdrive M-Sport
1984 300TD-T 304k
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 12:26 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page