WSS-M2C200-D vs -D2 vs D3

[mossietheno1]

Hi all

The Main point is that I'm trying to understand are WSS-M2C200-D vs WSS-M2C200-D2 and WSS-M2C200-D3 are backwards compataible?

Just trying to figure gearbox oil for B76M-R which seems to be a ford-Mazda gearbox.
Castrol recommends a 75W which is WSS-M2C200-D2 I'm wondering would it be better if i went with a WSS-M2C200-D3 oil.

Thanks

 

[mossietheno1]

found these sheets from ford.[1],[2]
seem to answer that WSS-M2C200-D is an older version of WSS-M2C200-D2 but WSS-M2C200-D3 totally different.

This website go along the same though process.
WSS-M2C200-D [3]
WSS-M2C200-D2 [4]
WSS-M2C200-D3 [5]

[1]https://www.msds.ford.com/cpc/productDetails.asp?pgn=8&FIRNo=181193
[2]https://www.msds.ford.com/cpc/productDetails.asp?pgn=8&FIRNo=189486
[3]https://standards.globalspec.com/std/1101206/ford-wss-m2c200-d
[4]https://standards.globalspec.com/std/1243554/FORD WSS-M2C200-D2
[5]https://standards.globalspec.com/std/1601847/FORD WSS-M2C200-D3

 

[pbm]

I believe Castrol Syntran meets that D2 spec....so does Volvo's MTF for the MTX-75.

 

[mossietheno1]

Thanks pbm, I will put castrol on the list for the comparative gearbox oils before I buy.