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 03-08-2007, 06:14 PM
Registered User
 
Join Date: Mar 2007
Posts: 44
transmission shifting problem.

I have all the related problems of a maladjusted vacuum system, which I am going to address next weekend, with the help of this forum, but I am unsure if this is also related. My transmission will not shift into high gear until I am going 65 mph, regardless of throttle position. I do not want to drive it due to the high rpm's which I'm sure diesels are against. I have to work this weekend so I will be unable to work on it this weekend, but I was just wondering what you guys think. Could it be a throttle linkage problem?

Reply With Quote
  #2  
Old 03-08-2007, 06:17 PM
Registered User
 
Join Date: Mar 2007
Posts: 44
P.S. the car is a 1981 300D.
Reply With Quote
  #3  
Old 03-08-2007, 06:23 PM
Banned
 
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
What's the 1-2 and 2-3 shift points?
Reply With Quote
  #4  
Old 03-08-2007, 06:26 PM
Registered User
 
Join Date: Mar 2007
Posts: 44
the 1-2 shift is early at around 15 mph, and the 2-3 is around 35-40 mpg. The shifts are hard at part throttle but smooth out at full throttle.
Reply With Quote
  #5  
Old 03-08-2007, 06:28 PM
Banned
 
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
Quote:
Originally Posted by rmleedom View Post
the 1-2 shift is early at around 15 mph, and the 2-3 is around 35-40 mpg. The shifts are hard at part throttle but smooth out at full throttle.
The 2-3 is at 35-40 with very little throttle? If so, then it's also very late.
Reply With Quote
  #6  
Old 03-08-2007, 06:30 PM
Registered User
 
Join Date: Mar 2007
Posts: 44
I thought these transmissions usually shifted at certain setpoints, and the vacuum system adjusted the harshness. I realize throttle position will affect when the car shifts also, but this car shifts the same regardless of throttle position.
Reply With Quote
  #7  
Old 03-08-2007, 06:35 PM
Banned
 
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
If the throttle has no effect on the shift points, then the Bowden cable is not properly connected to the linkage or it's jammed in some fashion.........the cable regulates throttle pressure internal to the transmission and the increased throttle pressure serves to delay the shift.

I believe that vehicle also has a Bowden cable and that's the first thing to check.
Reply With Quote
  #8  
Old 03-08-2007, 06:35 PM
Registered User
 
Join Date: Mar 2007
Posts: 44
sure thing

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 04:49 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, 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