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 Post subject: Towing Question...do I need to change oil in rear axle?
PostPosted: Thu Jun 28, 2007 1:27 pm 
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I allready have the towing group...have heard that I should change the diff oil to a 85w140. Does the diff allready have this viscosity and is this change unnecessary?

Thanks

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 Post subject:
PostPosted: Thu Jun 28, 2007 1:32 pm 
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Yes and yes.

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 Post subject:
PostPosted: Thu Jun 28, 2007 1:38 pm 
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Thanks ... where did you get your info? I have seen far too many incompetant dealers for this type of info. Hence my post.

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PostPosted: Thu Jun 28, 2007 1:54 pm 
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It's in the back of the owner's manual. If it came from the factory with the tow package already installed, it should already have 85W140 in the rear diff.

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 Post subject:
PostPosted: Thu Jun 28, 2007 4:29 pm 
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How much fluid does a change take? Didn't find this in the manual.
BTW, synthetic 75W-140 is specified, not 85W-140.

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PostPosted: Thu Jun 28, 2007 6:02 pm 
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Wobbly wrote:
How much fluid does a change take? Didn't find this in the manual.
BTW, synthetic 75W-140 is specified, not 85W-140.

Thanks


4.4 pints. So you'll need 3 quarts and will have some left :lol: I think the 75w-140 systhetic synthetic would be a better all around choice since the other is not a synthetic :D

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 Post subject:
PostPosted: Sat Jun 30, 2007 2:52 am 
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Joe Romas wrote:
Wobbly wrote:
How much fluid does a change take? Didn't find this in the manual.
BTW, synthetic 75W-140 is specified, not 85W-140.

Thanks


4.4 pints. So you'll need 3 quarts and will have some left :lol: I think the 75w-140 systhetic synthetic would be a better all around choice since the other is not a synthetic :D


Ditto... What Joe said! I would only add that you will save a lot of trouble by using a gasket instead of RTV. You can get great gaskets that go on "dry" and will save a lot of time now and in the future:

www.lubelocker.com

Ask for the Chrysler 8.25 gasket. I use them on my CRD Libby and Jeep Cherokee. They are fantastic!

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 Post subject: Additive
PostPosted: Sat Jun 30, 2007 10:21 am 
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Don't forget the limited slip additive if you need it.
Put it in first. Then fill with gear oil.
Just a suggestion.

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 Post subject:
PostPosted: Sat Jun 30, 2007 12:51 pm 
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No drain plug in the differential case?
If splitting the case is required, is a new gasket, and/or RTV, SOP (if the Lube-Locker dry type, isn't used)?
On second thought, how could you fill it if there isn't a plug?


Wobbly


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 Post subject:
PostPosted: Sun Jul 01, 2007 12:02 am 
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how could you drain it all without flipping the Jeep over?

K

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 Post subject:
PostPosted: Sun Jul 01, 2007 1:17 am 
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Wobbly wrote:
No drain plug in the differential case?
If splitting the case is required, is a new gasket, and/or RTV, SOP (if the Lube-Locker dry type, isn't used)?
On second thought, how could you fill it if there isn't a plug?


Wobbly


Sorry, but only diff drain plug is on the front diff. The rear has a traditional cover and fill plug. You gotta pull the cover to drain well. You could use a suction gun, I guess, to pull the old oil out the fill plug, but you would not get a good clean change. Some metals and such would still be in the bottom of the pumpkin and get mixed in with the new oil. Kinda like changing your engine oil and not the filter.

It's a little time consuming on the first change, but, if you use a lubelocker gasket, it will be only a few minutes to make a complete change in the future.

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 Post subject:
PostPosted: Sat Oct 06, 2007 2:26 pm 
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I getting ready to tow cross country and change mine to Royal Purple 75 - 140 synthetic all around. I may be using full time if I hit snow through mountain passes so I also want the front to have plenty of protection. The front differential drain plug was loose but not leaking. Good thing it had a o-ring on it. Maybe it kept it from unscrewing the rest of the way. The rear I just removed the rubber fill plug and pumped it all out. I used the pump to refill both, took 4 quarts total. That made quick work of the change and cost less than $40 to do.

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 Post subject:
PostPosted: Sat Oct 06, 2007 3:20 pm 
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BlackLibertyCRD wrote:
if I hit snow through mountain passes


You may very well! :lol:

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 Post subject:
PostPosted: Sat Oct 06, 2007 3:38 pm 
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Cowcatcher wrote:
BlackLibertyCRD wrote:
if I hit snow through mountain passes


You may very well! :lol:


It will give me an excuse to stop at Les Schwab and get a set of new Toyo before returning to Delaware with the princess and other family members (2 dogs and cat). Dear I don't think we can make it without new tires. :twisted: I know better not to drive and tow the passes in the middle of the winter. P235/75-R16 AT Open Country is what I think they are called.

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 Post subject:
PostPosted: Sat Oct 06, 2007 6:03 pm 
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I tow quite a bit and in extreme heat. I'm about to do front and rear diffs. I need 4 quarts of 75w 140 in the rear. How much of what in the front?

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 Post subject:
PostPosted: Sat Oct 06, 2007 6:21 pm 
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it was 4 quarts total for front and rear.

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 Post subject:
PostPosted: Sat Oct 06, 2007 6:29 pm 
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Thanks!

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 Post subject:
PostPosted: Sat Oct 06, 2007 7:06 pm 
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Cowcatcher wrote:
BlackLibertyCRD wrote:
if I hit snow through mountain passes


You may very well! :lol:
Hey!! Ain't y'all heard about global warming yet?
LK :)

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 Post subject:
PostPosted: Sat Oct 06, 2007 7:57 pm 
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Anomious wrote:
Cowcatcher wrote:
BlackLibertyCRD wrote:
if I hit snow through mountain passes


You may very well! :lol:
Hey!! Ain't y'all heard about global warming yet?
LK :)


That's a political question and I know better then say what I think :-)r

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