DIY: Rear Differential Oil Change

SouthArk370Z

Like TreeSemdyZee, I change all fluids (especially the first change, to get rid of break-in junk) earlier than what the factory calls for. After the first change, I'll usually go with 75-85% of factory specs.

With modern lubes, factory recommendations are just fine for most DDs, but I'm Old School.

YMMV

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Tractionless

I'm with you all ^^ on changing early, just thought I'd ask if there's an inherent problem that necessitates the earlier changes. I saw some at 7k, 12k, 15k which seems like a waste of time and money if it's purely a DD type. Thanks for the responses.

PickleZ

Thanks for the DIY spearfish - Made it that much easier! I have about 50k on mine and I'm thinking the previous owner must have changed the fluid at some point. The fluid was fairly dark, but still translucent and not like some of the photos I've seen. There was a decent amount of metal on the magnet (I guess it's doing its job). It's good peace of mind to know the fluid is fresh though. I didn't need to jack up the rear - just slid cozily on under the muffler. Arm just got tired from using a manual pump to get new oil in.

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JARblue

I wish I could fit my fat a$$ under the Z when it is sitting on the ground

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TreeSemdyZee

Truth. I got partially stuck when trying to slide under. Had to stop freaking out so that I could wiggle my way out.

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Borla S-Type | Motordyne | Z1 (lots) | South Bend | K&N | Nismo/Nismo S-Tune | Eibach | Aerojacket | Fujimara | Spl | ZSpeed Performance | Kenwood-Infinity-Sound Ordnance | Whiteline | Ecutek | Hotchkis | Clazzio | VQ Vortex |Morimoto XB |Dynosty Tune 329.64hp 265.73 ft/lb

Ghh0st

I just got done doing this, pretty straight forward. However, when accelerating quickly to higher RPMs (5-6k) I smell the distinct gear oil smell in the cabin for a short amount of time.

I checked the diff and it's not leaking, it was slightly damp around the drain plug but not sure if it was from the initial change and I didn't clean up well enough.

Anyone else had this experience?

TreeSemdyZee

Yes.

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Borla S-Type | Motordyne | Z1 (lots) | South Bend | K&N | Nismo/Nismo S-Tune | Eibach | Aerojacket | Fujimara | Spl | ZSpeed Performance | Kenwood-Infinity-Sound Ordnance | Whiteline | Ecutek | Hotchkis | Clazzio | VQ Vortex |Morimoto XB |Dynosty Tune 329.64hp 265.73 ft/lb