Transmission Question

[Scut95]

Does anyone know what kind of fluid a 1985 GT tranny takes? Is it ATF or gear oil? Im swaping out the drive gear in the tail shaft in my dads car so the speedometer is correct. I'm doing it next weekend but i need to get the fluid soon. Thanks guys

[silverstangboy]

ATF mercon III

A T-5's a T-5's a T-5