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

LinkBack Thread Tools Display Modes
Old 08-21-2002, 08:24 PM
Registered User
Join Date: Feb 2002
Location: Seattle WA
Posts: 39
Vacuum Modulator 190E

I disconnected the vacuum modulator from my '91 2.3, and it seems to shift better than if it was connected. I had the "harsh" 1st shift and "flaring" on 2-3 and 3-4. With it disconnected, I get a slight harsh 1st, but all other shifts are nice and firm, the way I like it. My question, is it OK to leave the VM disconnected? Will any harm be done to the transmission? I did plug the vacuum line to the manifold, so no leaks.
1991 190E 2.3 SOLD
1972 911t 2.4 owned since 4/80 300,000+ miles SOLD
1999 C43
Merlin XLM, All Ti, 17.5lbs.
Reply With Quote
Old 08-21-2002, 09:12 PM
R Easley
Posts: n/a
Good evening, Randal --

That's quite a few miles on the 911 -- congratulations!

On the modulator, many times individuals will try to "nurse" their transmission along by increasing modulating pressure but you went straight to the endpoint by completely disconnecting it.

How long is the delay before engagement b/t Park to Reverse and Drive to Reverse?

The reason that your flaring is gone is that you are signalling to the tranny each time that you are under full load and you want the firmest shift possible.

*Assuming* that the vacuum modulator was adjusted properly prior to disconnecting it and assuming that you were getting proper vacuum to it (both of which would lead me to believe that the flare that you experienced was due to worn K1 and K2 clutch frictions) , I don't believe that you are going to hurt your transmission anymore than it is hurt already.

Richard Easley
Waco, Texas
Reply With Quote


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 08:50 PM.

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