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Old 04-07-2015, 02:09 PM
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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?

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Old 04-07-2015, 02:42 PM
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Quote:
Originally Posted by davelv View Post
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?
Use the latest manual version 8. Whoever told you to use the original version manual is an idiot. 8 versions for one model year is ridiculous though and they wont send you the current one if you alresdy have one of the first seven i tried to get that already. You only get one free copy wrong or not.

The plugs are 100k for the 2014. Not sure about the oil but i would use what version 8 says
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