DIY: Transmission Oil Change

dkmura

Regarding the mileage/time factor, I had the MT85 in my T3 SCCA racecar tested by Blackstone this spring. I'd left it in for three years and wanted to see how it tested. Plenty of life left (low TAN), but iron wear was a trace higher than their universal averages. After talking with them, they suggested pulling another sample in 2018 and comparing.

Keep in mind, this tranny gets used extremely hard during race season, but rarely sees much mileage outside of that. Probably 1,400 of the hardest miles on any Z tranny out there.

barncobob

don't know what testing cost$ but might be cheaper to just change the fluid..

dkmura

Testing in bulk is about $28, but cost is not the primary reason to do it. It provides a snapshot of the overall health of a component, like an engine or gearbox. It also let's you know whether a particular product is working well for that application.

In my case, my Z gearbox is in pretty good shape, considering the heaps of abuse and heat it gets subjected to in racing. MT85 is doing a good job preserving the primary parts like syncros, main shafts and other seals that would otherwise need a teardown to determine.

And yes, it's still cheaper to do a UOA than "just change the fluid".

JARblue

Interesting

Can you post a print of the analysis results?

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