Which rear diff. fluid should I use?

[JaguarS4R]

I need to change out rear diff main seal and fluid is starting to leak more and more, which fluid should I use?

 

[ConeCrusher281]

Royal purple

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[1996MysticSnake]

Amsoil, royal purple was causing my rear to bind around turns

 

[Murder Snake]

+1 on the Amsoil

 

[SVT Pille]

Amsoil is great stuff.

 

[9svt8]

Amsoil is what's in mine. I also put in a tube of their slip-lok

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[thor455400]

Motorcraft's in mine.

 

[2DXTRM]

Ive used Redline 75W140 and Quaker State 75W90.

 

[USMC53CHIEF]

I use Lucas

 

[JaguarS4R]

which weight? Synthetic obviously with or without lsd?

 

[USMC53CHIEF]

I've used 80/90, and I've also used 75/140... it was like 98* the other day here in northern ohio

 

[gq916]

regular 75w-90 or 80w-90..the shop i took it to used valvoline