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ejmct 09-04-2007 07:33 PM

Changing Differential Fluid
Took my Jeep to the dealership today and they told me the differential fluid should be changed evey 12k miles @ $200 a clip.

Dies this sound right?

penguin_in_a_cj 09-04-2007 07:38 PM

every 12k is a little excessive. I change mine every 30k and have had luck with it.. its also much cheaper to do yourself

debruins 09-04-2007 07:45 PM

and its easy if you buy the $15 from harbor freight tool that sucks the stuff out, you dont even need ot take the cover off, i would take the cover off every 60,000 or so and completely clean it down with paint thinner, but if you change it every 20,000 you shjould be good

MOz 09-05-2007 07:29 AM

What type of driving do you do? If you are on the road and not pulling loads all the time then you should assume a light duty service factor ~ 30K miles.

richp 09-05-2007 09:24 AM

For $200 I'll come up and do it for about bendmeover pricing.
Lift jeep on 4 jackstands
Grab oil change bucket and 1/2" socket set
Make coffee
Grab coffee cup and sit under jeep, loosen bolts
Remove bolts except for a top one.
Pry cover loose and allow to drain
Remove last bolt, scrape cover clean
Put a bead of Black or Red RTV around the cover, allow to sit, refill coffee
Clean the housing out with brake cleaner.
Put cover on, tighten bolts, refill.
Repeat on front.
Total cost ~$40 + $12 for a pound of Starbucks French roast beans. Or you can get industrious and do all your fluids while you have it up on jackstands.

ejmct 09-05-2007 09:46 AM

I bought the car at 33k miles and took it to the dealer yesterday at 35,950 to get some last-minute warranty stuff done. One of the things I noticed when I had it on a lift was that the front diff. was slightly leaking (really just looked wet but never left a spot in my garage). So in warranty I wanted them to fix it before I realized that it should have been done long before that. They did the rear too under warranty.

They told me it was leaking probably because it had never been done before.

I don't tow with it and mostly use it on-road. I probably won't have the dealer do the diff. service again even if I don't end up doing it myself.

Buffalo97 09-05-2007 10:26 AM

Changing seals
I have an issue too with a small leak at the cover as well as at the drive shaft.... what's the work inviolved there guys...???

MOz 09-05-2007 12:52 PM

You should be good for ~ 30k miles no problem. Nice of them to cover it under warranty. However, next time it will be on your dime. It's an easy job, just a little messy.

MOz 09-05-2007 12:55 PM


Originally Posted by Buffalo97 (Post 131732)
I have an issue too with a small leak at the cover as well as at the drive shaft.... what's the work inviolved there guys...???

Are you sure the leak is at the shaft location and not the cover gasket? If so, then that's a whole other story. I would double check that one for sure.

Buffalo97 09-05-2007 02:36 PM

Well, I can see fluid on the shaft and the Fluid stain goes to the U joint. I asked the oil change guys (express lube or something) what was involved and the were very helpful and said parts weren't going to be that bad $$ wise..... just time consuming. Reseal the diff cover or buy a new one then remove the seal around the shaft.... and I think this is where the problem or trouble or time really would come in....

Sorry If my writing is ambiguous.... I'm at work and typing as quickly as possible

MOz 09-05-2007 04:31 PM

I'd follow richp's advice and do the diff. cover first. Clean it thoroughly and re-evaluate for the shaft seal.

Walkeraviator 09-05-2007 05:51 PM

Yeah I changed teh seal on the front of my diff where the drive shaft goes in... the seal was like $7 i think.

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