4Runner diff goes synthetic
The differential gear oil used in Toyota 4Runner and FJ Cruiser vehicles has been changed to a 75W-85 GL5 synthetic gear oil beginning with the 2008 model year.
This new synthetic gear oil is compatible with 2003-2007 4Runner and 2007 FJ Cruiser differentials. Note that Toyota lists different gear oils for LSD and non-LSD differentials.
P/N Toyota Genuine Differential Gear Oil TYPE
08885-02606……. 75W-85 API GL-5 SAE 75W-85……. LSD
08885-02506……. 75W-85 API GL-5 SAE 75W-85……..w/o LSD