What type rear diff fluid?

What weight of rear diff fluid do you all run/recommend and what brand? Is royal purple all hype? I live in Ohio, only driven in summer, never at the strip.

Sent from my SM-N960U using the svtperformance.com mobile app

I personally like Royal purple for my diff. In all my cars. If your running the stock LSD i would also add ford friction modifier.

Ive used 75/140

I use Amsoil Severe Gear 75w140 and their Slip-Lok friction modifier. Just remember it's 1.25 quarts total capacity for the diff.

amsoil for sure

It’s right in the SVT Supplement that came with the cars.

Is also easy to download and read: http://www.terminator-cobra.com/2003SVTCobraSupplementGuide.pdf

Amsoil here.

As always, thanks for the info. Thank you jrgofin for the link, very helpful