Started doing my own 904's after a trans shop close by didn't even get me to the shed before they bent me over, so now I do my own and with help from John Cope and Rick Allison of A@A I now have no 904 issues. with the proper selection of part's and some oiling mods mine have given me good service life.. one thing about cheeta trans brake VB's is you need to up the line pressure from what they build them at and they will work good and give you a VB that won't burn your cluches up, found out the hard way.