How do you replace a rear main seal in a Datsun 280Z. Do you have to remove the engine or tranny. or can it be done in car?

To replace the rear main seal in a Datsun 280Z, you typically need to remove the transmission, as access to the seal is limited without doing so. While it's possible to replace the seal in the car, it can be challenging due to space constraints. It's often recommended to pull the engine for easier access, but if you're experienced and have the right tools, you can attempt it with the engine in place. Ensure you have a new seal and proper tools before starting the job.