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Reply to "What is the best ZF transmission oil to use in a 1974 Pantera?"

Hi Jan,

I have used it before and it seems fine, but have switched to VP Racing Classic GL4.

Lloyd writes the following in his RBT website:

Q. What type of oil should I use in my RBT-5 DS-25/2 or RBT-6 transaxle?

A. We recommend that you use an API GL-4 rated gear oil.

Our transaxle designs use the highly efficient Spiral Bevel style crown wheel and pinion set. There is no Hypoid offset in this type of gearing; hence, there is no longitudinal sliding along the face width of the tooth. Therefore, the additional friction modifiers used in GL-5 type oils are not required. These friction modifiers, required to reduce heat and prevent scoring on Hypoid gear sets, can have an adverse effect on the function of the transaxle synchronizers, for example, requiring greater shift effort.

VP-Classic-Gear-Oil-GL-4-SAE-80W-90



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