[eye-m-hip]

I am going to change my front & rear differerntial oil on my 2001 Impreza 2.5RS (automatic transmission). Seeing that the rear differential on the 2001 RS has LSD, do I need a oil that is for LSD. Will I need the same oil for the front and rear or different for the rear seeing the rear has LSD. Thanks for your help.

 

[FryphaX]

You do need friction modifier. I use Motul Gear 300 Ls for the rear differential.

The front diff is supplied by the transmission lubricant. No need for friction modifier / Limited slip oil in the trans.

 

[silverton]

I believe on the manuals the front diff is supplied with transmission oil, but on the automatics it is a separate unit with a drain and fill hole that seals with the front diff dipstick.


Here's the service manual page for AT front diff fluid replacement.

2001ImprezaGC-ATDiffGearOil.pdf - Google Drive

 

[00redOBS]

I am going to change my front & rear differerntial oil on my 2001 Impreza 2.5RS (automatic transmission). Seeing that the rear differential on the 2001 RS has LSD, do I need a oil that is for LSD. Will I need the same oil for the front and rear or different for the rear seeing the rear has LSD. Thanks for your help.

The rear LSD is a Viscous unit, its sealed.