John,

There should be no problem for the transmission, but seals can always be
problematic.  Some early synthetic formulations may have shrunk seals
slightly and caused leaks according to some anecdotal experiences I have
heard about, but I have not heard about any problems lately.

Obviously it won't fix a worn transmission, but it could buy you more
time.  I really believe in synthetic oil for transaxles since they shift
easier and last longer!

John wrote:
>
> Stuart,
>
> Is there ever a problem due to the gearbox having been run with mineral
> based oil for years and then switched to synthetic or radial seal
> compatibility ?
>
>     JP

--
Stuart MacMillan
Manager, Case Program
800-909-8244 ext 208

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