[simon110]

Hello

last week i spent 2 days going over my Z force 800. new belt, Dr Pulley weights, oil change, greased all points, and i changed front and rear diff oils, i used 85/140 Semi Synthetic because i thought it would help. the magnetic drain plug had quite a bit of debris on it maybe 1/8" thick
I have had the buggy a few months and haven't even needed to used 4x4 yet, i used it for work for 2 days which was 60 miles 3 weeks ago, but today on the road in 2wd i heard a loud bang bang bang. i stopped and the front diff side cover had a hole in it and all the oil was dripping out, i limped home, and found 1 crown wheel bolt smashed up and half out the hole, i removed this and turned the diff and the other 5 bolts where loose.. the 4x4 engage and diff lock are still operational. so maybe just a case of loose bolts? the buggy has done 4000miles. and some evidence of hard off road use is noticeable on the under side. any ideas??? i have ordered a new cover and bolts but will see if it needs more when i remove it.. please can someone explain this problem or has it happened to you, surely this cant be the result of thicker oil.

[NMKawierider]

Some others have had this happen but it was just from loose bolts from the factory. The lube probably isn't the cause but using the 140 is a bit heavy. I use it in the rear as mine was grinding-up aluminum and I was trying to slow the destruction...which it has.