Does anyone know if the transmission fill hole services the Overdrive as well as the Transmission.
My manual says to fill the Transmission and the Overdrive unit, but it doesn't specify how you fill the Overdrive itself.
I am assuming that the transmission will feed the other unit.
the overdrive fills with the trans filler plug, on the English manufactured OD units such as used on 250GTE's it's also reccomended that the OD screen & magnetic plug be cleaned at regular intervals. Screen is accessible by removing the brass plug at the base of the unit.
There are two different types of Laycock De Normanville overdrive units that are used on Ferrari's. One is filled through the normal transmission fill plug at the left front of the transmission case, the other has its own large brass fill plug on the left rear of the tailhousing. If you drain the overdrive on the second type you MUST refill it through the separate fill plug as there no common oil sump between the transmission and overdrive unit.