Diff Fluid

Edgyver

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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

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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

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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
 

Balto

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

 

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