Hey,
Has anyone used synthetic diff lube?
What kind?
How much was it and how many quarts does it take?
Need answers ASAP because I'm planning on changing it tomorrow morning.

Thanks.

I use Amsoil Series 2000 Synthetic Gear Lube 75W-90 on both my cars. It should take less than 2qts.

The differential takes 1.4 quarts of fluid.

One key tip...loosen the fill plug first so you know you can put fluid in. I've herad many stories about draining the fluid only to discover the fill plug is stuck.

I haven't done mine yet, however I bought Mobil 1, about $6 a quart.