>
>I read the Manual and it stated that I can look down a hole in the top
of
>the OD through trapdoor in the car.
I have no idea what this referrs to - have rebuilt OD units and have no memory of a trap door or what u desxcribe below. What manual.
I know this sounds obvious - but have you chacked the oil level in the gearbox. Marginal oil level will cause a gradual decline in the operation.
John