Topic: 1979 403 olds rear main seal needs changed

[Toolmaker1965]

Hello I have 1979 TA 403 with 71000 original miles on it. I have a rear main seal leaking and I was wondering if it can be changed without pulling the engine. Is this possible?

[Wallington]

To remove the sump you'd need to partially lift the engine meaning disconnecting a lot. By that stage it may be just as easy to pull it out even if only partly. There's a few main seal types that can be used, often easily nicked when trying to install with limited access, then you have another leaking main seal only realised when completed

[Toolmaker1965]

That's kind of what I was thinking and Its a lot of work to pull it but I guess I'll bite then bullet and take the time. Thanks