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 ShopForum > Technical Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 05-27-2003, 06:05 PM
1967250s's Avatar
the monster
 
Join Date: Jul 2002
Location: Ottawa
Posts: 694
Question +++ Tranny Question +++

The car : 1967 250s, AT 230sl 4 speed

The tranny slips up to 4th then OK.

Shifting manualy do's NOTHING.

I need to know something before I start "fidling" in there.

If the diaphragm was shot (or blocked vacum line), would I be able to shift manualy?

Will change AT filter as soon as I'm done fixing the brakes.

Comments welcomed.

DAN
__________________
http://w3.uqo.ca/gravelle/images/250S/flood.jpg
DAN
1967 250s The Monster Project a.k.a "The Monster" a.k.a "Rolling Coffin" --sold--
The photographic ART thread
+++Price Guide+++
Reply With Quote
  #2  
Old 05-27-2003, 06:33 PM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Properly conditioned modulator pressure is critical to those old trannies.

There is a rubber diaphram that failed regularly in the modulator. There also is a device called a double lifting solenoid on the top of the trans. There are three positions, idle, full throttle and everywhere else. The everywhere else position is the unpowered state; meaning the solenoid is powered to the other two positions. The solenoid moves a linkage that attaches to the modulator and the three positions creats three wildly different ranges of modulator pressure.

You should verify the modulator pressure with a gauge and if much less than spec verify that the linkage is in the right position. There is an access cover under the tunnel rug on the right side. Makes a hole the size of a grapefruit at the top.
__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
Reply With Quote
  #3  
Old 05-27-2003, 08:29 PM
1967250s's Avatar
the monster
 
Join Date: Jul 2002
Location: Ottawa
Posts: 694
Thanks for your promp reply.

From your answer, the modulator and/or double lifting solenoid will affect the manual shifting capability as well... correct?

Should I eliminate valve body malfonction?
__________________
http://w3.uqo.ca/gravelle/images/250S/flood.jpg
DAN
1967 250s The Monster Project a.k.a "The Monster" a.k.a "Rolling Coffin" --sold--
The photographic ART thread
+++Price Guide+++
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 07:38 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page