Can Royal Purple with LSD additive in R154 cause harder shifts?

[Tim]

I noticed the same problem with the Royal Purple synthetic when I fist put it into my tranny. The shifts got notchy and slight grinding. I switched over to Pennzoil 80-90 and it shift beautiful now.

 

[jdub]

I take by the first post that this was now RP Syncromax which is made for MT? Has anyone had experience with this stuff?

From Post #2:

Synchomax is recommended for manual transmissions that specify automatic transmission fluid, multi-viscosity motor oil or straight grade motor oil...Synchromax is much lower viscosity (less than half at ops temp) than what the TRSM calls for (an 80W-90). Personally, I would not use it in either a W58 or R154...it's simply too thin.

Not a good idea to use in a Supra tranny...way too thin. Use Red Line MT-90...much better choice if you want to use a syn tranny oil. The Pennzoil 80W-90 Tim is using above is a good choice as well.

 

[ImperfectSupra]

Has anybody use this type of transmission fluid will this work?


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[jdub]

Has anybody use this type of transmission fluid will this work?
View attachment 71701View attachment 71702

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Pretty sure that contains friction modifiers for an LSD...not good for a R154.

 

[ImperfectSupra]

Vavoline full synthetic 75 90

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[jdub]

Vavoline full synthetic 75 90

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That has zero to do with it....
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