There is one gasket with 17 bolts on 4L80E models, while the 4L60E pan contains 16. 3. Weight/Size Because of the application, the 4L80E is much heavier and larger than the other transmission. It ...

When the pan is removed, it is likely to be torn, making it a good opportunity to replace the gasket as well. As you remove the transmission oil pan, part of the dipstick shaft will come out with it.