I totally agree, I just changed to Red Line MT90 synthetic in my 833 and it only took about 20 miles for the transmission to start grinding between the gears both up and down shifting. Before I changed the oil, the transmission always shifted very smooth and solid. The book calls for ATF or an all purpose sae 140 gear oil. I am looking for the 140 gear oil but have not had any luck so I will be going back to the ATF. So, my 2 cents from experience, is do not put synthetic oil in your 833. I just started a thread asking where I can find sae 140 gear oil before I ran across this thread, I also don't want to hi-jack this thread
