[W126 Coupe] Transmission Question

[mavris2 at comcast.net]

Tracy,

In response to you question I would take a look at possible the vacuum line 
had popped off the AT Modulator Valve located on the left side of the 
transmission.  Or the other possibility is the AT Modulator Valve has gone 
bad.
If you shifter is really wobbly its like the busing had broke, but the 
chances of it coming off are near impossible because there is a retainer 
clip.  So, I don't think that is your problem.     I had something similar 
on a 420sel.  Its was like diving a stick it would go but the shifting just 
keep getting progressive worse.  The stealership said I need a new 
transmission right away due to having 280,000 miles. But it shifted fine and 
had always been serviced. I just was not buying there answer.   I went on a 
hunch and took it some where else. I replaced the AT Modulator Valve on the 
transmission.  That solved the problem in my case.  Its shifts perfectly and 
the new place said that eventually it would just stop shifting.  So, I don't 
know but I'd kind of think that may be your problem.  I know there is the 
valve, O-Ring and rubber cap that all come as an assembly and its rather 
simple to install.  You need a vacuum gauge to dial it in properly for the 
shift points but members here on the sight say you can tweak it.  I 
Installed mined and was not able to tweak it properly. So, I had the new 
place do it they only charged me 60 bucks.  So, I can't complain.

Jason

----- Original Message ----- 
From: "Tracy Walkup" <twwalkup at hotmail.com>
To: <mbcoupes at mbcoupes.com>
Sent: Monday, January 31, 2005 10:15 AM
Subject: [Norton AntiSpam] [W126 Coupe] Transmission Question


>
> I finally got my car back on the road after a LONG motor rebuild / 
> replacement project.  Many posts from the group have been very helpful 
> over the past few months as I have done the work.
>
> The question I have is a transmission question.  I was at speed. 
> Everything fine.  I then noticed a lack of power.  Gave it gas and 
> realized then that the engine was fine.  It was as if I had pushed in the 
> clutch of a manual shift car.  No "connection" to the trans was the 
> symptom.  There was no noise, no hesitation, no indication of any kind 
> that there was a problem.
>
> Have not got the car to a place where I can get under it yet (that is 
> another AAA story for later), so I apologize in advance if this problem 
> turns out to be a simple third grade solution.
>
> Fluids all OK.  No apparent leaks.  Engine starts and runs normally.
>
> Questions:
>
> 1.  What electronic control / connections / etc are required.    Fuse? 
> Plug came out of  trans?
> 2.  If the mechanical shift linkage came off does the trans default to 
> neutral?  Shift rod off of trans?
> 3.  The cable attached to the throttle linkage at firewall serves what 
> purpose?  (it is attached)
>
> Trans is a fresh rebuild (less than 100 miles)  Car is 1986 560 SEC.
>
> Thoughts please?
>
>
> Tracy in Atlanta
>
>
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