Actually, I have had great experiences with Royal purple, but Richard, the manual
trans genius and I had a conversation by pm about it and he pretty much convinced me that its better to go with penzoil or synchromesh. Basically he told me about a number of
tranny's that he's taken apart and he said the ones that were using the synthetic turned the synchros to crap, and tremec does a lot of testing on their stuff and they also recommend the penzoil or gm synchromesh. I still have the royal purple synchromax in mine and its working great, I had a rebuild about 18 moths ago and had carbon fiber synchros installed, but the royal purple has been in there for about 8 months and no problems whatsoever. IMHO Richard really knows
tranny's and I'm inclined to go with his advice, I plan to when I change the fluid again, and royal purple is about $12 a quart, definitely not cheap. I do use only royal purple for all other lubes in my car, did a lot of testing when I worked as an engine builder and nothing works as well. If you decide to use royal purple you can find it at pep boys.
to flush or not to flush 
so im driving a 02 gt with the 3650 tranny and im wondering if a flush would be worth it or just to change the fluid but drop the pan and clean out whatever gunk it has built up seeing as i have passed the 100k mark i was thinking about a flush but i dunno if i wanna have all that fluid going backwards through the system 
kinna scares me. anyway if anyone has good or negative to say plz chime in and richard the local drivline guru i would greatly appreciate your opinion... Aamco Trans. here in town said it owuld be $245 for flush and fluids and filter but correct me if im wrong the 5 spd 3650 doesnt have a filter does it???
