I have a 72 240 Z with 60K miles. It appears the rear oil seal on the rear extension housing of the transmission is leaking. The propshaft is throwing oil onto either side of the underneath of the car. I looked at the service manual I have, but it doesn't give a lot of detail as to how to replace the seal. It appears it can be replaced by dropping the propshaft and "prying" off what appears to be a cap and replacing the seal. If anyone has done this and has more detailed instructions, please help me out. Thanks.