[W126 Coupe] Oil leak - transmission advice

[Jonathan]

First off, I'd take that 0-40 out Straight away..our engines were never 
designed w/ that weight in mind...plus, these new styles of oil do NOT 
have the anti wear additives that our engines need.. Nevermind an oil 
with that large a spread will be Very susceptible to sheering once warm. 
You will do all your wearable bit a great disservice by keeping that oil 
in your car.  The ONLY M1 you should be running in the 15/50 Extended 
Performance..this still has the zinc/phosphate that out engines Need.

As for the trans, if it's slipping and adjusting the mod/changing fluid 
doesn't fix the problem it's time for a rebuild.  I'd suggest using B&M 
trick shift....it's by Far my pref'd fluid for our transmissions.

Jonathan


stefansj at canisius.edu wrote:

> Hey everyone,

> I recently changed my oil with Mobil 1 0w-40 (My first synthetic switch). The 

> engine runs wonderfully, however, I have now encountered another problem. 

> The car sat for 10-15 years before it came into my posession developing a 

> minor leak between the tranmission and engine. This was very minor until I 

> changed over to the Mobil 1. I assume the synthetic change really cleaned out 

> the seal making the leak a concern. I plan on taking out the transmission and 

> replacing the seal (I know, a pretty big job). My tranny has always had slight 

> slippage until it warms up (after accelerating 3-4 times). So my question is, Is 

> there anything I can do while I'm in there to fix the slipping? Anything I should 

> replace since Ive gone that far? The car is a 83' euro 380SEC with 78,000 miles. 

> Any advice you guys could give me before I take on this job would be a greatly 

> appreciated! thanks, Jas

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