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  #16  
Old 05-13-2009, 01:43 PM
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Quote:
Originally Posted by polarisrmk View Post
Has anyone ever used a Synthetic? I tried a Synthetic (redline) on my jeep and it was not very happy with me. switched back to dex 3 and problem went away.
I use Mobil 1 in the trans and boy does that stuff work great. I change it at 100k mile intervals. First 100k miles the stuff that came out was just as clean and nice as what I refilled it with. I was amazed at the cleanliness of the valve body and pan. Replace the filter with the fluid and of course drain the converter as well. Mobil 1 is expensive, but heck at 100k mile change intervals its far cheaper than any other route. I'm about a quarter of the way through my second interval and the dipstick still shows bright red clean fluid.

For trannys my experience has been Mobil 1 ATF and GM Syncromesh for manual boxes are about the best you can do.

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  #17  
Old 05-13-2009, 10:37 PM
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How much fluid should I put back in? should I fill it until the dipstick gets to the full mark when cold?
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  #18  
Old 05-13-2009, 11:25 PM
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And then start the car, put it through the gears, and with it still running check the level. It will probably be low.

-Jason
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  #19  
Old 05-13-2009, 11:28 PM
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Originally Posted by polarisrmk View Post
Have you added any inline filters or transmission coolers? How often are you changing the ATF and Filter in the pan? I have typically done changes every 15k on my jeeps and 25k on just about everything else. I have heard that the mercedes trans will last a long time if you change it often. but how often is often?
Personally, I would recommend a secondary ATF cooler on all w123 diesels. The ATF is cooled through the radiator, which will keep the ATF at engine temperatures no matter what, cooler is always better
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  #20  
Old 05-14-2009, 12:04 AM
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Originally Posted by compu_85 View Post
And then start the car, put it through the gears, and with it still running check the level. It will probably be low.

-Jason
Should I then top it back up with the car running up to max again?
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  #21  
Old 05-14-2009, 07:07 AM
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You run it through reverse and drive and check the level in neutral, right?

I find it difficult because when I look at the stick, it's all covered with oil 6 inches on both sides. I try to put it in real quick and sometimes get 6 inches of oil on one side, but the other side will stop somewhere between the marks.
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  #22  
Old 05-23-2009, 10:19 PM
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Originally Posted by ah-kay View Post
x2
Fine, if you run a $700 beater.

Not a good idea if one has invested money and time restoring an old timer or young timer MB. Then again, someone who owns a 6.3 knows better than to listen to some of poor advice given here.
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  #23  
Old 05-23-2009, 10:27 PM
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Despite Jerry's obvious determination to p!ss off everyone he can with that last comment and his signature, I agree. Wal-Mart ATF/oil is fine to keep you going, but I wouldn't use it in anything I really care about.

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