Ditto. NO synthetics or gear lube in the front...unless you don't care to have the diff-lock working..Only good conventional motor oil, and Tractor hydrolic oil or KawieChem wet brake oil in the rear.Ditto. You are suppose to use engine oil in the front diff. Tractor hydraulic fluid is what i use in the rear as well.
The diff lock is several friction disks. With synthetics, thay have a hard time making enough friction to lock, but they will...for a while. Then in time the surfaces get smoother and smoother until they stop working...but they don't wear out!!..lolive been putting amsoil in my front diff schould i change it back to dino oil? i havent had any problems yet its a 05 brute