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Originally Posted by josephb34
Why the factory runs the trans fluid through the radiator where it sees 220 degrees , without a external cooler in the return line .... is beyond me . Utterly stupid .
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The 220F water enters at the top. The trans fluid enters the bottom of the radiator, where the radiator fluid has been cooled by air passing through the coils. It would be interesting to measure the RETURN coolant temperature; it may be 150F or so...
Quote:
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Originally Posted by josephb34
So .... If I were you, I would start saving for a rebuild, and add a cooler After the radiator AFTER you rebuild i. Find which is the return line to the trans , and put a parallel cooler inline there. This will reduce temps tremendously. Or .... cross your fingers and change the fluid .... sometimes you get lucky and its just starving for fluid because the filter is partially clogged. Then add a cooler without hesitation.
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I'm partial to the change the fluid & filter first, then see. I don't see adding a cooler.
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Originally Posted by john1
Also sorry to say Mercedes makes a poor tranny (ZF's) and they just don't hold up as others.
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I had to replace my trans on the suburban at 80k. My SDL has 256k on the original trans. I can't believe that the MB trans is
that bad...
Just another $0.02
Best Regards,
Jim