gear oil weight and how much?
 

im getting royal purple but what wieght and how many Quarts

75w90. and i would get three to be on the safe side i cant remember how many they take

2.0L (4.25 pints. 2.125 quarts)...

It tell you on the tag of the rear end. i think it is 75w140.

so... 2 different answers? and can i just leave a little bit in there so i dont have to buy a 3rd bottle or should i buy 3 quarts? what weight is the correct weight for me

75w90 and buy 3

heres proof

http://www.americanmuscle.com/speedc...r-oil-kit.html

gear kit for our car comes with 75w90, not 140

That why i said look at the tag. It on there.

thanks and what kind or whar the type of my tranmission do i have T5 or t45 or t3650 an 02 manual

It's a Tremec 3650, the change from the Tremec T-45 was made in the mid-2001 models.

As to the differential gear oil for the 8.8" axle, here's what the '02 owner's manual says:

http://www.paladinmicro.com/images/20028.8OilSpec.png

You can download the manual from Ford, click here...

Do you not need the friction modfier with the synthetic gear oil?