1972 f250

[WA hunter14]

i have a 72 f250 that i just got going and been driving around a bit, it runs great but once you get into higher rpm's like before you shift the transmission makes noise. im not sure how to describe it kinda a groaning or growling not to loud but definately can hear it. i need to be able to count on this truck im moving in less than two weeks. if any body has any similar experience or any idea oh what it could be i would really apreciate it.

[Bofire]

Auto v8 or manual, 2X or 4X? where does the whine come from?

[jackelope]

1- if you're looking for a diagnosis you can count on, take it to a shop and have someone actually diagnose the noise. This venue will give you about a dozen or so things that May or may not actually be wrong with it.
2- if you're set on an internet diagnosis, we're going to need some more info. Assume it's a manual transmission?
3- I don't want to sound like a jerk but relying on a 40+ year old truck is gonna be tough. How has it been maintained?

[WA hunter14]

Auto v8 or manual, 2X or 4X? where does the whine come from?

its a manual 4 speed 351m, the whine definately comes from the transmission if you put your ear to the shifter you can here it very well, i would say it comes from the front of the tranny.

[WA hunter14]

1- if you're looking for a diagnosis you can count on, take it to a shop and have someone actually diagnose the noise. This venue will give you about a dozen or so things that May or may not actually be wrong with it.
2- if you're set on an internet diagnosis, we're going to need some more info. Assume it's a manual transmission?
3- I don't want to sound like a jerk but relying on a 40+ year old truck is gonna be tough. How has it been maintained?

i will absolutely take it to a shop but i was hoping that someone on here could tell me that they have had the exact same thing happen and they would no exactly what it was, not very high chances of that i know but alot of people have had and still have old fords. right now the 40 year old truck is all we have truck wise my mom has a car but that wont be much of a help where were going, my dads truck has 3 teeth chipped of his ring gear so its dead in the water. and where i live you cant hardly drive across town without seeing someone driving a 70's pickup theyre all over here and people like us love them.

[Buckmark]

Just gonna throw out some maybe's
If your just sitting at idle, not moving and you hear the whine noise, if you push the clutch pedal in and out does the noise change? If so it is most likely the throwout bearing..
If your driving along and when you shift and apply load to the transmission then it is either a bearing or wear on the gears, is the noise the same in every gear?
*
I would drain and refill the transmission and add a quart of hyperlube to it.. 

[WA hunter14]

sitting at idle no noise, driving at fairly low rpm's no noise start getting faster you get noise. same for all the gears. if im going down a semi steep hill in like 2nd gear to help slow me down you can hear it just as if you were driving on flat ground in 2nd gear going that same speed.

[Bofire]

  does working the clutch change the noise? clutch throwout bearings are pretty easy.
Carl

[fair-chase]

The first thing I would check would be the hubs to make sure they are unlocked. Then check to make sure the front driveline is free and can be turned by hand.

If I read this right; you described it as growling, equal in every gear, and equal at all rpm ranges. Only increases with speed. This would lead me away from the transmission and more towards an axle or driveline issue. But as Jackelope pointed out, it's really just guessing until you get it into a shop.

[WA hunter14]

got some new information, today was the first time i drove it faster than 45mph. when i get to like 60 and im on the gas the noise goes away, let off the gas and it comes back?!

[Buckmark]

Load -Noload situation...
Drive 60+ and your good...

[wildmanoutdoors]

I think you will have no problem getting thru a move with it. Its a whinny old Ford tranny. Its probably just getting broke in! 

[WA hunter14]

got some new information, today was the first time i drove it faster than 45mph. when i get to like 60 and im on the gas the noise goes away, let off the gas and it comes back?!

 

that is backwards im sorry i must have been in to much of a hurry to get back to work. when im on the gas it makes the noise when i let off it doesnt make noise. im not a mechanic by any means so this question is a dumb one but when driving down the highway foot on the gas the driveline is spinning but when you let completely off the gas but are still in gear does the driveline spin?

[WA hunter14]

nevermind i just googled that question, i dont know what to think it is now

[jackelope]

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

[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