thanks grumpy,i was so excited about my buy that i mixed up my oils,they say to use 20 grade oil so would that be the same as auto trans fluid?.i am going to un-do the fill plug and check the fluid level and take out a sample with a sarynge/rubber tube.i have safely jacked up the rear of the mower and will take pics as i go,even if i hafe to remove the rear diff and dismantel it for diagnostics .if the diff is broken internally i cant break it anmore but will be interesting for me and others to see whats going on...ken
