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 09-29-2008, 02:07 PM
babymog's Avatar
Loose Cannon - No Balls
 
Join Date: Jan 2006
Location: Northeast Indiana
Posts: 10,767
'87 300D Shift Points Question

My 300D seems to shift 1-2 around 3000rpm at full throttle. All other shifts happen in the 4500 range, so it seems that the "bowden cable" is not the issue, and the downshift button/switch is working. It also shifts smoothly and without flaring at all throttle settings, so not vacuum.

Is this normal for this transmission/car combination? I've really not noticed before.

My 190Dt would shift much higher 1-2, but that was a bit of a problem in rain as it would get sideways pretty easily. Perhaps the 300Dt was designed this way to keep the car under control better?

I'm interested in hearing where other '87 300D cars are shifting 1-2.
__________________

Gone to the dark side

- Jeff
Reply With Quote
  #2  
Old 09-29-2008, 03:17 PM
sixto's Avatar
smoke gets in your eyes
 
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,229
I haven't done that in ages but I think it shifts earlier in D than in 2 even at WOT.

Sixto
87 300D
Reply With Quote
  #3  
Old 09-29-2008, 04:11 PM
babymog's Avatar
Loose Cannon - No Balls
 
Join Date: Jan 2006
Location: Northeast Indiana
Posts: 10,767
So it sounds normal? I haven't tried delaying it with the shifter, makes sense it would delay the shift a bit (but I don't want to be hard on the 'ol girl, I'll stick with Drive).
__________________

Gone to the dark side

- Jeff
Reply With Quote
  #4  
Old 11-04-2008, 09:31 PM
awsrock's Avatar
Registered User
 
Join Date: May 2008
Location: Tinley Park, IL
Posts: 612
I am trying to diagnose something I just found out today- at WOT, the 1-2 shift is almost a 1-3 shift!
It shifts out of 1 closer to 5k, and then goes into 2 for maybe a second, and right into 3. I'm going to keep searching for something about this and maybe post a new thread.
__________________
Dan
1987 300SDL s200g, Herlevi pump, Elbe manifold, 722.6 collecting dust - 185k
Past: 1987 300D - 264k
Reply With Quote
  #5  
Old 11-04-2008, 09:35 PM
Registered User
 
Join Date: Aug 2008
Location: Louisville,KY
Posts: 184
Mine does the exact same thing, but I thought mine was broken too -- take my car worth a grain of salt though, its in rough shape
__________________
Java Developer/Linux SysAdmin

Current:
*1984 300D ~200K,1989 MR2 250K, 2012 Ford Fusion 4.5K (fiance's car to replace the uber-unsafe cavalier)
----------------------------------------------------------------------------------
Past: 1998 Chevy Cavalier ,2005 Saab 9-3 2.0T, 1996 Mazda Protege, 1974 Porsche 914 2.0, 1997 Land Rover Discovery 4.0L/5Speed, 1995 Jeep Wrangler
Reply With Quote
  #6  
Old 11-04-2008, 11:15 PM
Registered User
 
Join Date: Jul 2007
Posts: 517
Hey Jeff,

I'm dealing with the same exact issue. Six and I have been corresponding about this issue just recently.

So your shifts are soft, that's good. No adjustment needed on the vac modulator

Shift points are primarily adjusted by the bowden cable nut (which I broke 2 days ago)

The accelerator cable nut (just above the bowden) tightens/loosen the cable. tightening it (iirc) will make shifts crisper.

However, my shifts from 2 to 3 still slip and shift around 4k at WOT (not good, esp on freeway). it doesnt flare and kick me into 3rd as it used to because i've softened it w/ the trans modulator (turning Ccw). I've read just about every trans shifting, bowden cable thread and i have read 2 or 3 guys say that their K2 valve springs were busted and by replacing it, the shifting returned to normal.

bob
Reply With Quote
  #7  
Old 11-05-2008, 04:00 AM
compress ignite's Avatar
Drone aspiring to Serfdom
 
Join Date: Feb 2004
Location: 32(degrees) North by 81(degrees) West
Posts: 5,554
Master List for Tranny Woes:
Transmission:

http://www.peachparts.com/shopforum/diesel-discussion/112381-transmission-modulator-adjustment.html#post791654

It's CRITICAL... how you set your transmission's vacuum system on your diesel MBZ...

BUT this is the "Tour De Force" for adjustment...stevebfl is the Tranny Guru:
http://www.peachparts.com/Wikka/TransVacTune
__________________
'84 300SD sold
124.128
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 06:45 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, 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