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  #25  
Old 10-26-2012, 05:10 PM
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Re: Diff Cover Removal - 60K Service

Good show Chas now you can rest easy knowing it's done properly, and you saved yourself some bucks.
Oh Yeah that stuff has a really special odor!!!!!!!!!!!
If it got on your clothes throw them out I've never been successful washing it out.
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  #26  
Old 10-26-2012, 11:06 PM
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Re: Diff Cover Removal - 60K Service

Well my diff oil was still see through/caramel color with 30k on it. I had a very fine paste of metal "shavings" on the magnet. The oil is still good at 30k but i change it anyway. 15k is really short. I dont tow anything. I dont wear out my diff oil in 15k.

Ive seen the same thing in the diff of my dads suburban at 20k and at 200k. Fine metal powder shavings at every change.
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  #27  
Old 10-27-2012, 05:50 PM
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Re: Diff Cover Removal - 60K Service

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Originally Posted by Bikemobile View Post
Well my diff oil was still see through/caramel color with 30k on it. I had a very fine paste of metal "shavings" on the magnet. The oil is still good at 30k but i change it anyway. 15k is really short. I dont tow anything. I dont wear out my diff oil in 15k.

Ive seen the same thing in the diff of my dads suburban at 20k and at 200k. Fine metal powder shavings at every change.
If you look at the '08 WK Owner's Manual and Factory Service Manual, you can actually go much longer than that (no towing or severe service): 60K miles check and 100K miles fluid change.
I did 36K and 65k mileage changes and the fluid was like new. I'll wait longer this time for the next one.

Link to '08 WK Owner's Manual: http://www.wkjeeps.com/Manuals/2008_...d_Cherokee.pdf
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  #28  
Old 10-27-2012, 06:07 PM
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Re: Diff Cover Removal - 60K Service

I bought my wk with 20k on it CPO from a jeep dealer. All the fluids were changed then ( i found my cpo paperwork.) so right now. At 58k, the fluid only really has 38k on it. It was clean.

15k is overkill
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  #29  
Old 10-28-2012, 07:49 AM
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Re: Diff Cover Removal - 60K Service

Yeah I dont do any towing as well and all the miles I drive are highway and some city. Based on what the original fluid looked like after nearly 60,000 (looked pretty good), this should be a 30,000 mile job for me. I'll check it from time to time for safe measure.

After having driven the Jeep for a day or two now, it does run considerably smoother. Maybe its more in my mind, but just general driving feel is much improved.
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  #30  
Old 10-28-2012, 05:57 PM
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Re: Diff Cover Removal - 60K Service

so the drain plug is up top?same one as fill?
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  #31  
Old 10-28-2012, 06:31 PM
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Re: Diff Cover Removal - 60K Service

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Originally Posted by jeep5.7 View Post
so the drain plug is up top?same one as fill?
Drain on front diff. is on bottom (fill on top).

No drain on rear, just one large plastic plug to suck out and pump in.
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  #32  
Old 10-28-2012, 08:02 PM
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Re: Diff Cover Removal - 60K Service

The point of a service interval is to remove fluid before its contaminated enough to cause damage. The diffs are the workhorse of the vehicle, low vents, under the vehicle that can allow moisture and debris in, axle seals and bearings that are not designed to be 100% sealed from the outside in, they dont work just as well both directions. I am not saying that its not a little overkill, but I am saying paying the man 1300 dollars to overhaul my rear diff is not on my to do list despite the fact that I would do it myself for 230 dollars in parts. Thats great the fluid looked clean, post some oil analysis reports and not just "it looked good" and then the color will actually mean something.

ESPECIALLY considering just sucking it out and filling it up your talking adding 20 minutes of work to ONE oil change a year or so for just above average drivers. But hey, do whatever you want, you may never have problems, and you may have big problems... hell I need more work anyway, I think you should just never change it
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  #33  
Old 10-28-2012, 09:00 PM
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Re: Diff Cover Removal - 60K Service

Dude I'm a novice is trying to be more active in the maintenance of my Jeep because I care and really am eager to learn about taking care of it myself. Its not just something I want to swap in and swap out of the diffs. I want to do it right and regularly. I had no idea about oil analysis kits. That's why I'm here to learn about this kind of stuff, next time I extract the diff fluid I'll be sure to run an analysis for good measure and to make sure I'm looking at the fluid accurately. As for now, it was a good first time changing it, was needed after 60k miles and no change. I appreciate all the input.
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  #34  
Old 10-29-2012, 06:47 PM
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Re: Diff Cover Removal - 60K Service

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Originally Posted by 2005JGC View Post
The point of a service interval is to remove fluid before its contaminated enough to cause damage. The diffs are the workhorse of the vehicle, low vents, under the vehicle that can allow moisture and debris in, axle seals and bearings that are not designed to be 100% sealed from the outside in, they dont work just as well both directions. I am not saying that its not a little overkill, but I am saying paying the man 1300 dollars to overhaul my rear diff is not on my to do list despite the fact that I would do it myself for 230 dollars in parts. Thats great the fluid looked clean, post some oil analysis reports and not just "it looked good" and then the color will actually mean something.

ESPECIALLY considering just sucking it out and filling it up your talking adding 20 minutes of work to ONE oil change a year or so for just above average drivers. But hey, do whatever you want, you may never have problems, and you may have big problems... hell I need more work anyway, I think you should just never change it
Be gentle. OP is trying to learn.

One water fording is cause to inspect the fluid....no matter how many miles. He doesn't use it in severe service, so 60K miles is 1/2 the required change interval for the '08 model year. Jeep stands up to my lifetime powertrain warranty on that basis. What new tribology has surfaced since then?

OP is supposed to be enjoying his new toy.....not worrying about low probability failures. The fact that he is doing it is likely better than most non-Jeepers do.
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  #35  
Old 10-29-2012, 11:33 PM
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Re: Diff Cover Removal - 60K Service

Here's my rear differential at 117,000 miles I thought it was clean and in pretty good condition but someone else may have opinion otherwise lol. I'm the second owner and the original owner had service records pretty much keeping with every interval on the transfer case and both diffs. Here's short video I posted on Youtube:
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  #36  
Old 10-30-2012, 01:48 AM
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My reply was NOT to the OP, it was to bikemobile. No problems with the OP

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