Thread: Front and Rear axle lubricant change

I just went to the stealership yesterday, and they mentioned that it would be good to change the front and rear axle lubricant on my 4x4 KK 2008 limited Liberty since I have 18K miles. They wanted to do it for the tune of $261.00. I passed on the service for now because I wanted to see what my owner's manual actually said about the service.

I checked my owner's manual out, and it said that it would be okay to inspect the axle lubricants @ 18K, but only change them if my KK was used for police, taxi, fleet, offroad, or frequent trailer towing. None of which I use my KK for. Therefore, what has been the experience of you other owners of the KK? When are you changing your front and rear axle lubricants? Are you doing it @ 18K regardless of the type of use, or are you doing it @30K or later? There is no other service change interval listed in my manual for the front and rear axle lubricants after 18K.

With synthetic gear oils you need to change often,12k-15k is the normal life of syn gear oil.

Currently your KK has dino oil in it. I would change it out at 18K. Its cheap insurance. Even better if you can do it yourself.

I did the front myself, since it has a fill and drain plug. the rear i paid the dealer labor (.75 hr= 60.00) to change the rear. It requires pulling off the cover and resealing. I used AMSOIL 75-90 for the front and AMSOIL 75-140 for the rear.

If you use your liberty for just DD or grocery getting. Dino will be ok, but if you do more than just that id go with synthetic. It doest cost that much more and you can near double your use with it.

Rear axle is synthetic,and needed for warranty.

Originally Posted by 4jeeps

Rear axle is synthetic,and needed for warranty.

Not true,having 85w-140 din gear oil,and friction modifier if needed, more then meets warranty requirements if you tow and will do a better job at keeping your diff bearings happy over any synthetic gear oil.

The manual say synthetic,and Amsoil oil say synthetic see the #3:Maybe the older one but from what I see 08+ are synthetic

Differential, Rear......GL-5
All TEMPS......75W-140 [3]
SEVERE GEAR 75W-140 Synthetic EP Lubricant (SVOQT)
80W-140 Synthetic Long Life Gear Lube (FGO05)
Transfer Case,......AP4
Synthetic Multi-Vehicle Automatic Transmission Fluid (ATFQT)
Fluids
Power Steering Fluid......AP4
Synthetic Multi-Vehicle Automatic Transmission Fluid (ATFQT)
Brake Fluid......HB
AMSOIL Brake Fluid DOT-3 (BF3SN)
Clutch Fluid......

[1] Use motor oil that is formulated to meet Chrysler MS-6395.
[2] Mopar part no. 04874464 or equivalent
[3] Synthetic oil is required.