I built a 4wd last year based on a xxx4 tranny. it was thinner than my Durango and the cells placed in the centre also the motor and servo and it balanced from left to right and front to back and ran 100% reliably the best thing was that it jumped amazingly and was very quick the second we ran it
ED KERRY run it at our track D.H.D racing/Xtreme RC and wanted to use it
well isay xxx4 tranny just the diffs and belt the lay shaft and clutch was mine
also tranny was sealed and made of carbon.
Just a bit of fun , it got nicknamed the flying sausage
good on, you keep it up! after all its good for the sport and very much fun
ps theres a thread on rcracechat called (anyone making any secret projects) they might like a look
my home made 2wd pics are on there also on there
my bro has an industrial vacuum former at xtreme rc if you need a shell send me the mould and i will see what we can do
well done