1972 f250

[WA hunter14]

Normal whiny ford transmission is my thought. Is the trans full of fluid? Is it engine rpm related or vehicle speed related?

yes fluid is good, engine rpm. so i went to the shop the guy said either a pinion bearing or a rear tailshaft bearing. i cant think of a way to tell wich one?

[jackelope]

Not pinion bearings if it's engine rpm related. That'd be vehicle speed related.

[WA hunter14]

ok thanks seems like we have got it figured out

[jackelope]

So what was it?

[WA hunter14]

u joint closest to the tranny