1985 300TD California Transmission

I have a 1985 300TD wagon with a California only transmission. Can someone tell me what the difference is between this transmission and the other 49 state transmission? I know that the trans gaskets are different. I am thinking that they might have geared it differently to make the engine run at higher RPMs to maybe make it burn cleaner or something. If I ever have to rebuild the transmission would it be better to get a transmission from a car from another state? Does anyone out there know? Bill Brewer Tehachapi, CA

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