[W126 Coupe] Transmission Changing Gears with a Bang

[Dick Spellman]

Ernie,

The vacuum hose with black rubber adapter will connect to a metal tube 
stubbed out on the driver's side intake manifold.  So, if you have the 
tube in hand without the black rubber connector, look for it with an 
open end on the manifold.  It will either be a single or T rubber 
adapter.  If the rubber is on the vac tube in your hand, look for the 
metal stub that will be bare and sucking air on the driver's manifold.

Now you know what the function of the transmission vacuum modulator 
is...smooth shifting vs. the hard bang at shift points.

Regards,

Dick

  oter it willOn 11/19/2010 8:06 PM, Ernie Stephens wrote:

> Hey Michael,

>

> You are right!  Found the connection point at the tranny but not the 

> engine . . can you tell me where they hid the connection point at engine?

> Thanks,

> Ernie

>

> Sent from my iPad

>

> On Nov 19, 2010, at 5:09 AM, Michael Ramay <mike.ramay at gmail.com 

> <mailto:mike.ramay at gmail.com>> wrote:

>

>> Check the vacuum line from the back of the engine to the driver's 

>> side of the transmission. Betcha it's loose.

>>

>> On Thu, Nov 18, 2010 at 10:48 PM, Mister McGoo <eelploot at hotmail.com 

>> <mailto:eelploot at hotmail.com>> wrote:

>>

>>     Did you accidently disconnect a vacuum hose to the transmission? 

>>     - Bellamy

>>

>>     ------------------------------------------------------------------------

>>     From: stevetsg at msn.com <mailto:stevetsg at msn.com>

>>     To: mbcoupes at mbcoupes.com <mailto:mbcoupes at mbcoupes.com>

>>     Date: Thu, 18 Nov 2010 21:26:05 -0700

>>     Subject: [W126 Coupe] Transmission Changing Gears with a Bang

>>

>>

>>     Ladies and gentlemen,

>>     Wouldn't you know it; a couple of hours ago I had just finished

>>     changing the oil pan gasket, replaced the neutral lockout switch,

>>     tightened what I think is the oil pressure switch to keep it from

>>     leaking oil, and replaced the steering damper.  So, I clean up

>>     the mess, get in the car to take it for a spin and the first

>>     thing out of the driveway "bang" as it shifts into 2nd gear, and

>>     bang again as it goes through each shift..  I did feel a bit of a

>>     hard shift before I put the car up on jacks but something

>>     happened dramatically in the course of a few hours on the jacks;

>>     did I break something when I jacked the car up or did I

>>     disconnect something unknowingly?.  I only lowered the

>>     transmission enough to remove and replace the neutral switch! 

>>     Any ideas? I had this transmission rebuilt at 99k and it is now

>>     at 214k.

>>     Ernie

>>

>>

>> The MB Coupes Website!

>> W126 SEC Mailing List

>> Postings remain property of MB Coupes, L.L.C.

>

>

> The MB Coupes Website!

> W126 SEC Mailing List

> Postings remain property of MB Coupes, L.L.C.


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