Quote:
Originally Posted by kaisen
Tim- I've seen failures (transmission, transfer case, and differentials) from condensation diluting/ruining the fluid in climates with humidity and temperature extremes. The detergents can also break down or oxidize with age. Fluids can even turn acidic. Plus modern synthetic fluids are superior. So why would you recommend skipping it?
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Because I have NEVER had a problem EVER with a manual gear box many of which have had over 200k on them. I will say that I have receipts from the previous owner of my 911SC having the tranny rebuilt, but I think the 915 transmission is was simply a poor design that does not hold up well to the power thrown at it whether it has fresh oil or not.
I have heard of 4wd transfer cases and diffs going bad also, but I am fairly confident they are due to the nature of use of a 4x4.... not because someone failed to change the gear lube often enough. On the rare case of a car, maybe it was involved in a flood and took on water through the vent..... I have lived in NW Ohio my whole life and we get big weather extremes through the four seasons... NEVER had a gear oil related failure of any kind.