Differential Oil

[Harry]

I am about to refill my 1966 230SL differential oil with new oil and I find an old container still having some oil from a prior fill (when IU replaced the boot with a split boot).  That oil is Valvoline 80W-90 with Limited Slip.  I just bought the same but without the "Limited Slip".  What are the recommendations on oil for the differntial?

Harry

[Jowe]

You should use Hypoid gear oil SAE90. See the service manual at https://www.sl113.org/wiki/Restricted/ServiceManual

[kampala]

Do you have a Limited Slip Diff?    If so, you need the special oil designed for LSD.    Our Diffs have a special metal tag attached to the diff that mention Special Oil required if its an LSD (in German).

Sample photo - pulled of the net

[WRe]

Hi,
an "SP" can also be stamped next to the axle number and the axle ratio.
...WRe

[Harry]

No indication of limited slip.  Thank you!