Which is more useful for used fluid analysis, transmission or diff oil?
Inspection II soon...I'm asking the dealer to grab a sample of the engine oil and either the transmission or diff oil to send in for analysis. I only have two sample containers total and don't want to spend more than that many samples.
Of transmission vs diff oil analysis, which is typically more useful in evaluating the condition of the drivetrain? I recently found out my car's previous owner neglectfully missed the 1,200 mile service, so it is possible this is the first time those fluids have ever been changed (45,500 miles now).
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