What oil?

I have just swapped in an 84-87 F150 manual trans behind my flathead, and need to know what oil is used in this trans, it was suggested Dexron, but isn't this an ATF?

 

75 w 90 gear oil is what I'm finding for most ford trucks of that vintage , dexron is a hybrid , may work , id check with a reputable parts house to be sure but I'm sure some one here will chime in

 

My mid 80's ZF 5 speed manual runs ATF, factory spec!

 

That is true and they also use atf in their 4x4 transfer cases also.