I've got a 95 Z28 M6 and the transmission isn't bad, but it could be a touch better going from 1st to 2nd. My friend recommended adding Lucas Transmission Fix. So my question is, how do i do this? The diagrams i've found have a "fill" plug on the driver's side of the main casing... is it as simple as opening that up and adding the Lucas additive?

Please advise.

 

It won't help.
Fill plug is on the side of the trans and labeled.
Original blocker rings then were fibre and it may be time to go carbon.