Question about Oldsmobile Aurora

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Change tranny oil and what kind?

126k on 97 aurora. I purchased last fall at 115k. not sure of the history. Should I change the transmission oil and what kind of oil should I use

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Some trans shops will tell you after 100k that you should not change fluid. I see some valid points in this in that if unit has a large amount of varnish and debris, it could loosen up and migrate to important components. However, I don't entirely "buy into" this simply because in not changing it you absolutely ensure that the unit will fail soon.(the oil itself looses it's ability to do its job, both from a chemical and physical aspect.)
If oil you remove looks burned or is heavily contaminated, change it (with filter) then in about 2000miles, change it again. (when you drop the pan you are only changing half the old fluid, the remainder stays inside the converter) If old fluid is "normal...used" change it once, then again next year (regardless of miles driven).
You can check for exact fluid type by asking at any good trans shop or at a local dealer...its likely dextron 3 but they keep changing requirements. If doing a "short" change use something like the wallmart brand (actually quaker state in a different container) then on second change get and use either the same or better (like a synthetic), adding a good mild additive like the sealer & conditioner made by Lucas. Doing this will not guarantee you will not have a failure but gives you the best protection possible against it.
good luck!

Posted on Apr 16, 2009


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For example, a few days ago I had a worried customer call me and tell me she could not afford a $1500 transmission. I assured her that the starting point wa to do a transmission service for her car. Her car did not have a tranny pan and tranny filter, so all we did was drain her ATF (automatci transmission fluid) and I noticed it was dark and almost even black. New ATF should be red like Kool-Aid. This was a sign this tranny oil was no good. I refilled her car and took it for a test drive. I was happy to find that the shifting had improved immediately. She was so happy when she got her car back.

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