The 57904 is better suited for a limited-slip rear differential
The 58304 is better suited for a manual transmission, but can also be used for a limited-slip (clutch type) rear differential for maximum lock-up, as in the rear differential may make more noise.
However, you should check what type of lubricant is actually specified. Amsoil website suggests API GL4 type for the manual transmission and API GL5 for rear differential. I use Amsoil in my '11.
Last edited by POS VETT; 01-21-2020 at 05:53 PM.
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