Castrol Transmax CVT Voa/Spec Sht

[Revving2Redline]

https://www.oil-club.ru/forum/uploads/monthly_2019_06/698773619_1649386_CASTROL_1.jpg.e84f5b4e6e16df624013969cd521ebab.jpg

https://www.oil-club.ru/forum/uploads/monthly_2019_05/11.PNG.a7bd4cfbfa771c02290d4e6de65354a4.PNG

Apparently TBN is pretty low so my changing it out every oci or every other seems to be a good practice. It still performed well for me all this time and have used it for over 210,000 miles of the 368,000 miles. Granted I bought like 70 qts on clearance for nothing. Hoqe this helps someone who is interested in their transmission fluids.

 

[ctechbob]

Does TBN even matter that much in a transmission?

 

[Revving2Redline]

Does TBN even matter that much in a transmission?

I dont know,but I am sure it affects wear and other variables just like low tbn in oil. Still easier to change fluids than transmissions.

 

[kschachn]

For all practical purposes TBN does not matter in an ATF. You certainly would not want the fluid to be acidic so they add some buffer to prevent that, but without the products of combustion it's not going to have a continual ingress of acidic compounds.

And TBN does not affect wear in an ICE. It affects corrosion but not wear.

Significance of TBN in ATF?

I noticed that several ATF companies include TBN numbers in their ATF specs. For example, Petro-Canada Dexron VI has a TBN of 2.0, and I think I read somewhere that Amsoil ATF has a TBN of 12.0. I didn't find anything through a Google search on why TBN would be important - I thought it was to...

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