I emailed Tuff Torq and they sent this back to me..see attachment. File to large to upload, they suggest changing the oil at 50 hours and then every 250 hours. If you email them, they will send the procedure,step by step.....salessrvc@tufftorq.com
#4
StarTech
Glad you got a reply from TT but I haven't even heard a peep out of them.