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  Topic Review (Newest First)
12-07-2019 10:30 AM
GmanWJ Service interval is 12k. My experience has been it gets very grumpy if you try to push beyond that. Full fluid change. Also recommend Lubelockers, so glad I installed them.
12-07-2019 12:14 AM
HampshireWJ Think I'd go for a fluid change too - that 'B' service schedule seems to cover most normal driving conditions and you've got double the advised mileage from the oil so far. Working on the theory of oil being cheap and easy to do, and axles expensive and tricky, I'd go for the cheap and easy!

Wish I'd gone the Lublocker route when I did my diffs - no leaks but it would have been simpler. Have fun.
12-06-2019 09:37 PM
Uniblurb You're welcome Tumbleweed and below are links to the front D30 & rear D44a Lubelocker gaskets.

Also below are a couple photos of the ones I bought prior to install on my differential covers. Note the 2nd photo is sideways. Good luck.
12-06-2019 05:52 PM
Tumbleweed83 Thanks for the input, Uniblurb. I appreciate the part numbers for the gaskets.
12-06-2019 05:10 PM
Uniblurb I'm using the same Mopar products and quantities you do in my 04 4.7 with Quadra-drive. When my rear 44a vari-lok axle started acting up between 25-30K miles since the last fluid change I played it safe and changed out the fluid along with friction modifier.

While it added some more costs I also installed the Lubelocker LLR-D030 gasket under the D30 cover and the LLR-D44HD gasket on the 44a cover. Didn't use any RTV or gasket maker, which I used solely before, and no leaks.

We aren't that far apart and climate wise I'm sure we both drive when below freezing (32F) along when above 90F at freeway speeds in the summer. If you look at the below wjjeeps maintenance schedules those items are listed in the schedule B where you may want to change your fluids a little more often.

Believe I'd change the fluids/FM and it will also get rid of any fine metal or water condensation. Good luck.
12-06-2019 01:29 PM
stover02limited Of course, I'm a cheapskate and don't use the Mopar stuff.

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12-06-2019 01:28 PM
stover02limited I've never added friction modifier at all when I've serviced mine. I'm surprised you had issues.

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12-06-2019 01:15 PM
Vari-Lok, change fluid or add a little FM?

2003 Overland with Quadra-Drive at 137,000 miles and carefully changed front and rear diff oil 11 months ago at 113,000 using Mopar synthetic 75W 140 P/N 04874469 and added Mopar friction modifier 2.5 oz front and 4 oz rear and it has been performing flawlessly. Also changed NV247 transfer case at the same time using Mopar P/N 05016796AB fluid.

Fast forward to today 24,000 after fluid change and the Vari-Loks are just starting to growl a bit on start up in cold temps. Can I get by with adding 1/4 or 1/2 oz of FM to each diff or should I quit being lazy and do a proper fluid change?

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