Hello all,
First post here. As the title states i am having a problem. A friend picked up an 11 850 xp all stock and blew the neck off the front diff apart almost immediately. He stated he wasnt in 4wd when this occurred too which makes things interesting. I removed the diff and took it apart for him, the ring gear was chipped so that was replaced along with all new bearings, seals, and upgraded to an aluminum cage. The plastic one was not broken fyi. The armature is also in good shape.
So long story short, clean it all up, inspect, and rebuild and install. He also opted for a billet pinion cover as he broke the ADC neck.
Now after all this when the unit is in on the lift its acting as its in 4wd even with the rocker in 2wd. Also i unplugged the diff connection plug and the same result. Has anyone had this happen? Im scratching my head on this one. I took the diff back apart to double check everything and everything is as it should be. Has anyone had any issues with the male and female cup bushing wearing to the point where it will bind and do this?
Also should i have to reset the back lash preload since i replaced the ring gear? The manual states only when the cover is replaced. I am also going off an 09 manual and the internals are definitely different.
getting frustrated and wanting to get this resolved any help is appreciated.
-Matt
First post here. As the title states i am having a problem. A friend picked up an 11 850 xp all stock and blew the neck off the front diff apart almost immediately. He stated he wasnt in 4wd when this occurred too which makes things interesting. I removed the diff and took it apart for him, the ring gear was chipped so that was replaced along with all new bearings, seals, and upgraded to an aluminum cage. The plastic one was not broken fyi. The armature is also in good shape.
So long story short, clean it all up, inspect, and rebuild and install. He also opted for a billet pinion cover as he broke the ADC neck.
Now after all this when the unit is in on the lift its acting as its in 4wd even with the rocker in 2wd. Also i unplugged the diff connection plug and the same result. Has anyone had this happen? Im scratching my head on this one. I took the diff back apart to double check everything and everything is as it should be. Has anyone had any issues with the male and female cup bushing wearing to the point where it will bind and do this?
Also should i have to reset the back lash preload since i replaced the ring gear? The manual states only when the cover is replaced. I am also going off an 09 manual and the internals are definitely different.
getting frustrated and wanting to get this resolved any help is appreciated.
-Matt


