The Royal Treatment

[KJ02Ltd]

Just got done giving my KJ the "royal treatment" earlier today.

Changed out the front/rear diffs and engine oil and gave her the Royal Purple stuff.

That front diff is a ****** to fill. Any tips for next time? Let me know what you guys do and I'll tell you how I ended up doing it this time.

Changed out the tcase fluid, too, but couldn't find a Royal Purple ATF (is there such a thing?) so I put Mobil 1 (I think) ATF+4 (I'm sure) in it.

She's got 47k+ on her now. What's a good mileage for the diff fluid change? I think the manual calls for 60k so I should be good 'til at least 100k, right? I'm thinking it might need changed sooner if I decide to tow much with it or if I take her offroad much, right? That probably won't happen, though, since I've got my '09 JK on the way (on order). My KJ is just our Mall Crawler/Pavement Princess.

 

[Corwyyn]

That front diff is a ****** to fill. Any tips for next time? Let me know what you guys do and I'll tell you how I ended up doing it this time.

I drained mine then used one of those hand pumps with the flexible pvc hose to fill it, much easier than anything else IMO.

She's got 47k+ on her now. What's a good mileage for the diff fluid change? I think the manual calls for 60k so I should be good 'til at least 100k, right? I'm thinking it might need changed sooner if I decide to tow much with it or if I take her offroad much, right? That probably won't happen, though, since I've got my '09 JK on the way (on order). My KJ is just our Mall Crawler/Pavement Princess.

Schedule 'B' (what I would call 'normal driving' where I live) calls for changing the diff fluids every 24K miles. Schedule 'A' goes out to 120K miles and I don't see anything listed for the diffs, it just says to check the t-case fluid every 30K and replace it at 120K

 

[VTNomad]

Fluid changes

I had all my fluids changed at 51k. Basically the manuals 60k service. I was moving and I REALLY like my mechanic and wanted him to go over everything before I left. I just had him check the diff fluids and he said they'd be okay to 75k and we left them alone. The transmission flush made a noticable difference in shifting. I no longer have the hard shifts, which I had always considered a Jeep thing.

 

[tjkj2002]

Mobil 1 does not make ATF+4,they have a universal ATF but it is not meet the specs for ATF+4,but for the t-case it does not much matter as long as you used ATF.You must use ATF+4 in the ******,Valvoline and Castrol make ATF+4 now along with the ATF+4 found at the dealer.

12,000 miles is the diff fluid change intervel for the "B" maintance list,not 24,000 miles.

 

[Corwyyn]

12,000 miles is the diff fluid change intervel for the "B" maintance list,not 24,000 miles.

I stand corrected

 

[JeepJeepster]

Mobil 1 does not make ATF+4,they have a universal ATF but it is not meet the specs for ATF+4,but for the t-case it does not much matter as long as you used ATF.You must use ATF+4 in the ******,Valvoline and Castrol make ATF+4 now along with the ATF+4 found at the dealer.

12,000 miles is the diff fluid change intervel for the "B" maintance list,not 24,000 miles.

Wonder what the difference between the Mobil ATF and ATF+4 is. I looked on mobil 1's website and it says its full SYN but we all know how that goes.

 

[KJ02Ltd]

Mobil 1 does not make ATF+4,they have a universal ATF but it is not meet the specs for ATF+4,but for the t-case it does not much matter as long as you used ATF.You must use ATF+4 in the ******,Valvoline and Castrol make ATF+4 now along with the ATF+4 found at the dealer.

12,000 miles is the diff fluid change intervel for the "B" maintance list,not 24,000 miles.

I stand corrected, it was Castrol.

 

[KJ02Ltd]

Well, this time, since I was doing front/rear diffs, I had 4 quarts of fluid. I just squirted the "top" ~1/3 of 3 bottles into the front and used the rest for the rear. I guess I could've asked the guys at the hobby shop for a pump, but it never crossed my mind. I'm a newbie at this. Honestly, I can't believe I made it through pulling the cover off the rear diff and putting it back on w/o blowing up my rear axle, but it's still hanging in there.

 

[JeepJeepster]

I bought a pump at walmart for lower units on boat engines, works out great.

 

[offrovering]

so the rear diff cover needs to be pulled off to drain? but it has a fill plug, right? is there a gasket that is needed when replacing? this car is driving me nuts

front has a drain and fill plug?

 

[tjkj2002]

so the rear diff cover needs to be pulled off to drain? but it has a fill plug, right? is there a gasket that is needed when replacing? this car is driving me nuts

front has a drain and fill plug?

The front has a drain/fill plug since you'd need to remove one of the LCA's to remove the cover on the front diff.The rear just use RTV,I use Ultra Gray,to reseal the rear cover.