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#4487178 - 08/13/17 10:02 AM differential oil, heat
LAT Offline

Registered: 08/06/17
Posts: 1
Loc: Rancho Cordova,Ca
I have a BMW Z3 3.0l. I had some quarts of Lubrication Engineers ISO 110, leftover from my previous S2000 which had been recommended.
Does anyone know if this is good, bad, or adequate? interesting info is posted on Youtube.
Also diff is quite hot to the touch after a long drive, is this normal?

#4487189 - 08/13/17 10:20 AM Re: differential oil, heat [Re: LAT]
aquariuscsm Offline

Registered: 12/30/06
Posts: 17748
Loc: South Texas,USA
Originally Posted By: LAT
Also diff is quite hot to the touch after a long drive, is this normal?

Definitely normal. Mine does the exact same thing.
1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
QSUD 10W30
2012 Honda Accord Coupe EX-L 2.4,auto,San Marino Red
Pennzoil Platinum 0W20

#4487210 - 08/13/17 10:43 AM Re: differential oil, heat [Re: LAT]
MolaKule Offline

Registered: 06/05/02
Posts: 18782
Loc: Iowegia - USA
Since mechanical efficiency is always less than 100%, some of the HP from the engine goes into heating the oil and overcoming friction so differentials will get hot.

If overly concerned, purchase a finned after-market differential cover and replace the old cover and fluid with synthetic gear GL-5 lube.

Edited by MolaKule (08/13/17 10:44 AM)
Told my wife I wanted to be cremated. She made an appointment for next Thursday. smile

#4487228 - 08/13/17 11:12 AM Re: differential oil, heat [Re: MolaKule]
4WD Offline

Registered: 09/21/10
Posts: 5584
Loc: Texas/International
I do that on pickup rear ends somewhat for the cooling - but they tend to up the gear oil capacity as well.
Mine has drain, vertical fill (fill from bottle, no pump) and an oil level "tattle tell" port - all easy to get to ...
Lastly - this puts machined on machined gasket faces - gets rid of the flimsy stamped cover - never leaks.
2017 Tahoe 5.3L 4WD
2014 Fusion Hybrid
2013 Cruze RS 1.4T
2010 Canyon 5.3L 4WD