Re: Front / Rear Axle Oil Specifications
Jeep's advice is inconsistent. I have a May 2013 model year 2014 Grand Cherokee Summit 4wd with the Hemi. The manual says 75W-90 for rear and 75W-140 for the front diff. The latest pdf ver 8 says 75W-85 now for both. Likewise the original manual says change plugs at 30k miles, pdf ver 8 says 100k miles. So I email Jeep and the answer was use the latest manual. I call Uconnect Assist, and they say use the original manual, or if the parts department says use something else use that. Basically, we owners are left with no official answer because Jeep hasn't trained its customer service people to know.
Does anyone on this forum have a real answer to these differences?