Diff Fluid

[Edgyver]

I'm going to be taking several longer trips fully loaded in my LR4 and I am planning to change out the undercarriage fluids beforehand. I know with this heat on longer trips I can hear the diffs howl a little since they don't hold much fluid. Has anyone tried using 75W-140 full synthetic fluid? I do not have the locking diff.

 

[TimVZ]

I'm watching this conversation as I'd like to know if there is a fluid that I can either top off my rear differential or change the fluid myself. My understanding is that only the dealerships (nearest one is 2+ hours away) have the correct fluid and there isn't a compatible spec'd fluid available via retail. My pinion seal has a very slow leak, but if I can top it off to get me through the summer would be great.

 

[douglastic]

Our diffs are the same (non-locking)

I use Castrol Syntrax Longlife 75w-90, 2 bottles @ $16/ea on amazon.
Front: .69L, Rear: 1.16L

Easy DIY job using gravity and a long tube/funnel, or a cheap hand pump

 

[ktm525]

If you can't find that stuff Royal Purple is your friend.

 

[Balto]

I just did mine and put Redline 75W90 GL-5 in both front and back Diff’s.

75W90 GL-5 Gear Oil

Most popular Red Line gear oil, with thousands of applications for passenger cars, light trucks, and racing vehicles

www.redlineoil.com