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Old 07-11-2012, 05:07 PM   #1 (permalink)
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Date registered: Aug 2010
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When to change transmission fluid?

I bought my 2007 gl at 78000 mileage. It's now 100,000. I don't know the last time the transmission was changed. Please advise.
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Old 07-11-2012, 05:30 PM   #2 (permalink)
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now. fluid cheap. tranny not so much...
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Old 07-11-2012, 05:54 PM   #3 (permalink)
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What's the difference between transmission fluid and oil change? The manual says to change oil every 20,000 miles and trans fluid every 150,000 miles. I'm confused.
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Old 07-12-2012, 06:05 PM   #4 (permalink)
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oil change refers to engine oil only. Tranny fluid is very different stuff and performs much more like hydraulic fluid than the lube/cooling function of the engine oil.
If the 'truck' has ever been used heavily loaded or for towing (or if you don't know but suspect it has) then have a good indy change the tranny fluid now. Otherwise wait until the Mercedes required maintainence program says to do it.
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Old 07-12-2012, 06:53 PM   #5 (permalink)
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MB says to change the fluid at 39,000 miles and 143,000 miles.
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Old 07-13-2012, 08:27 PM   #6 (permalink)
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PS, I would have changed it at 78K when you bought it. To hell with what the book says...
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