Contemplating swaping my Getrag 5 speed for a 4L80/85 and curious what issues I might have with VSS since my 89 doesn't have remote DRAC module. I have located a 4L85 cheap enough but not quite sure of the year module, hope to find out more info tomorrow. From my searching I found that the 99-00 4L80 to be best fit for me, but this 4L85 is clean and easy to obtain. Guy thinks its a 02ish model and its currently coupled to an 8.1L. I'm Currently running the 427 PCM.