Pinion Gear question

[White Lincoln]

I poured some gear oil into the Lucas bottle, put a long hose and wedged the bottle up under the axle area. Let it drain for about an hour, took it out and tested. It was just about to the fill line. Perfect.

Took it off the jacks, drove it up and down the street in forward and reverse, fast, slow, brakes, parking brake, etc, etc... Awesome job. Can't believe I did this without that one issue.

I could not have done this without the encouragement and assistance from the members of this site. I thank you again for your excellent knowledge concerning these issues I create ( ) and the support of what to do to finish the project.

I hope this helps someone else down the way. Awesome site.

 

[KevinVarnes]

Something like this works pretty well for filling things like differentials and transmissions. They finally updated them so they fit the small and wide mouth quart bottles. You can usually find them at the parts store or in the hardware/automotive section of large chain stores.

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[White Lincoln]

Something like this works pretty well for filling things like differentials and transmissions. They finally updated them so they fit the small and wide mouth quart bottles. You can usually find them at the parts store or in the hardware/automotive section of large chain stores.

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Free Shipping - Performance Tool Fluid Transfer Pumps with qualifying orders of $109. Shop Fluid Transfer Pumps at Summit Racing.

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LMAO... sorry, could not help myself. I used one of those before and my hand got so tired and my wrist was dang sore I said never again. I liked that the area above the axle had a lot of room and I could just put the filler line into the hole, lift up the quart size bottle of fluid and tuck it under that area. Let it sit like that for an hour and ;let gravity do its job till its empty. No pumping. (I should have taken a pic of how easy it was) The Cougar may not be so easy, but yeah, I have used those before with "varied" results.

Thanks Kevin for sharing.

 

[MadMikeyL]

Valvoline sells their gear oil in bags that makes it very easy to squeeze all the fluid out into the diff, or trans or whatever. I’m a big fan!

 

[White Lincoln]

Hi again... Now that I have my rear end done, I am getting a humming noise from the rear. It does not get louder when I speed up or slow down. I am thinking it is one of two things: 1) The u-joint I used is crap (front at tranny) or the pinion nut needs another turn or it is too tight and needs to back off some?

Thoughts?

 

[Zep5.0]

Valvoline sells their gear oil in bags that makes it very easy to squeeze all the fluid out into the diff, or trans or whatever. I’m a big fan!

Same with Amsoil, best invention ever...

 

[Grog6]

You said the hum doesn't get louder, but does it change pitch with speed?
That's usually something rubbing.

 

[White Lincoln]

You said the hum doesn't get louder, but does it change pitch with speed?
That's usually something rubbing.

Nope, just a hum, like a bad bearing might sound? I am speculating on this. Does not get louder or change pitch... just a hum when the car is moving. I may need to take it out again and pay more attention to it, but while driving on the freeway and city streets, the hum did not change pitch or sound level.

 

[White Lincoln]

Took the car out for a drive to the store. The hum does increase when you speed up and the hum reduces when you slow down. But is not that noticable. I am just making sure I don't have the pinyon nut too tight. It seems to be reducing in volume (how much you can hear IN the car) the more I drive it. Could be the new parking brakes wearing into place. Or, as mentioned, the new u-joint I put is a POS.

 

[White Lincoln]

You said the hum doesn't get louder, but does it change pitch with speed?
That's usually something rubbing.

Once again, the pitch does not change much and as mentioned, it seems to be going away the more I drive it.

 

[MadMikeyL]

If the pinion nut is too tight, loosening it at this point will make matters worse. The crush sleeve can only crush once, so loosening it will result in play in the bearings. I suspect when you ran it with the pinion nut not tightened all the way it caused some wear to the bearings which is now causing your noise. If the noise isn’t too bad then I would not worry about it. Now that the pinion is properly tightened as the bearing continues to wear the noise may go away on its own. If it doesn’t, fixing the noise basically requires rebuilding the whole diff. So as long as the noise doesn’t get any worse and you can live with it I would leave it alone.

 

[White Lincoln]

If the pinion nut is too tight, loosening it at this point will make matters worse. The crush sleeve can only crush once, so loosening it will result in play in the bearings. I suspect when you ran it with the pinion nut not tightened all the way it caused some wear to the bearings which is now causing your noise. If the noise isn’t too bad then I would not worry about it. Now that the pinion is properly tightened as the bearing continues to wear the noise may go away on its own. If it doesn’t, fixing the noise basically requires rebuilding the whole diff. So as long as the noise doesn’t get any worse and you can live with it I would leave it alone.

Thank you grog, that is sound information. And the hum is not that bad. I doubt anyone else would even hear it. When I was selling my Mark VII and guy took if for a drive with me, I mentioned why I was selling it, the hum around 35mph. He said "what hum?" When I had to drive out to Santa Rosa to get a replacement bumper for the Mark VII, it was rather annoying to listen to that hum at 80mph. It was much louder than the Town Car and one reason I got rid of it. I do miss that car for its luxury though....