I did this about 18 years ago on my TR250 and would like to do it on my TR6. I believe I got the info from this forum. On the rear hub I drilled into the bearing housing and inserted a grease fitting. Now I've got grease-able rear hubs. The car i'm restoring has been sitting for 30 years and although the hubs spin very smoothly I would like to get some fresh grease in there and not have to loose sleep over it. Anyway I don't remember how to do this and did some internet searching and found nothing. hoping someone hear has done it and explain the procedure. I did practice on another hub and can't get the hole all the way into the housing.