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Old 09-19-2014, 11:52 AM
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Differential Service Interval on 2014?

Hi all and looks like a great community. I was a "lurker" before picking up my 2014 Overland V6 (gas). Dealer is telling me at 24k miles (where I'm at) that I need to change the fluid in each of the front and rear differentials at over $100 each, but I can't verify this with the user manual. Thoughts?

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Old 09-19-2014, 02:23 PM
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Re: Differential Service Interval on 2014?

Check this post: Maintenance at 15k???
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Old 09-19-2014, 02:34 PM
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Re: Differential Service Interval on 2014?

Quote:
Originally Posted by jacko15 View Post
Check this post: Maintenance at 15k???

Thanks; I had seen that as well as some other posts, but can't imagine 120k miles is right, and it seems there is simply no conclusive answer. But, 24k miles seems a bit aggressive and will likely wait til 30k as I don't tow or go off road much.
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Old 09-21-2014, 04:45 AM
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Re: Differential Service Interval on 2014?

I changed mine myself at 40K. The front still looked fresh but the rear was definitely dark. I'd recommend at least changing the rear at 30-32K and the front around 50K. YMMV.


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Old 08-11-2015, 02:01 PM
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Re: Differential Service Interval on 2014?

So just hit 38k and due for a service is there any updated thinking on diff changes? This is a 14 Overland and was going to do rear diff this change and fronts next. I never take it off road and get no snow here -- real light duty housewife stuff. Thanks!
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Old 08-12-2015, 12:44 AM
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Re: Differential Service Interval on 2014?

Does this help?

Jeep Grand Cherokee WK2 - Maintenance information and schedules
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Old 08-12-2015, 10:19 AM
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Re: Differential Service Interval on 2014?

Quote:
Originally Posted by exriguy View Post
So just hit 38k and due for a service is there any updated thinking on diff changes? This is a 14 Overland and was going to do rear diff this change and fronts next. I never take it off road and get no snow here -- real light duty housewife stuff. Thanks!
here is the scoop.

Your diffs and t-case shed a lot of metal during the first 5-10K miles. Amsoil had an old white paper where they did testing, and oil analysis. They had a conttol group they didnt change the gear oil and a couple test groups where they changed the gear oil early at 5K and 20K and then sample them all at 50 K and then 100K.

the control group had a lot of iron and what not flaoting around, very high ppm count.

My self on all my cars and trucks, I dump the fluids early and refill with synthetic.

On WK2 it is very easy since the diffs have a fill plug and drain plug, not the older covers to remove/clean up and reseal.

I hammered my jeep the 1st 100 miles to seat the rings. I drained all the fluids except the trans. I changed the gear oils and t-case again at 1500 mils,
In both cases there was a lot of pearl in the fluids I drained out, so I know it is a wise thing to do, since you dont want the metals floating around. I plan to dump them again next spring. Hopefully by then they t-case and diffs will be fully broken in and at the point I can extend the drain intervals to 36K to protect my warranty,I have the lifetime maxcare.

see attached pics, shows gear oil and trans fluid from t-case, lots of silver pearl floating aroung in the "soup", do you really want that crap in your diff?

I can change the fluid in about 15 min with a outboard lower drive pump which threads onto a qt bottle. By some 75w-90 GL5 synthetic or if you choose the Mopar 75w-85 fluid. I used Redline sinceI have 5 gallon pale of it.
Attached Images
File Type: jpg Jeep Gearoil 1100miles2ndchange.jpg (45.9 KB, 59 views)
File Type: jpg JeepTcase1600miles2ndchange.jpg (73.2 KB, 55 views)
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Old 08-12-2015, 05:57 PM
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Re: Differential Service Interval on 2014?

Did they not put a magnet on the drain plug?
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Old 08-12-2015, 08:58 PM
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Re: Differential Service Interval on 2014?

Quote:
Originally Posted by nikon858 View Post
Did they not put a magnet on the drain plug?
no magnet
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Old 08-13-2015, 02:40 PM
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Re: Differential Service Interval on 2014?

Interestingly enough, the Jeep Owners App on my phone says to replace both differentials at 20K
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Old 02-29-2016, 10:59 AM
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Re: Differential Service Interval on 2014?

Manual calls for mopar gear oil 75w-85 which costs $45 per quart. What do you guys use?

Can I use 75w-90? Seems like 85 is not as common.

Can anybody recommend a good hand pump as well?


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Old 02-29-2016, 11:57 AM
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Quote:
Originally Posted by Roki303 View Post
Manual calls for mopar gear oil 75w-85 which costs $45 per quart. What do you guys use?

Can I use 75w-90? Seems like 85 is not as common.

Can anybody recommend a good hand pump as well?


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I used the mopar75w85 but I think many on here have used the the 75w-90. just make sure it meets the spec and if you have ELSD that it has the friction modifier in it.

this one worked fin for me.
http://www.amazon.com/Plews-55001-Lu...rds=quart+pump
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