I just did a complete rebuild on my rear end and driveshaft and once all together, I am getting an on and off grinding sound. Sounds like it is coming either from the wheels and/or the pumpkin...hard to pinpoint. Has anyone heard a grinding type sound such as this on a new set-up? I have a video of the rear end running up on jackstands below.
Here it is on YouTube.com: https://www.youtube.com/watch?v=sEUO18qjx20&feature=youtu.be
I realize the video is shaky and flips- I captured it on my iphone...sorry, Jim
I'm a relative newbie, so I can't be of much help, but just to clarify, is the noise you are concerned about the periodic "buzzing" sound?
Drop one wheel at a time to verify which one is the offensive party - sounds as though it could be a hub bolt/nut rubbing the spring perch nut inside ?????
Thanks- I saw the wobbly wheel and thought I could have a wheel issue that echoes down the tube. Thanks for the tip. Mark, yes that buzzing sound.
Put your hand on the tubes, with as much noise as it is making you should be able to feel it. That'll help pinpoint where it is.
I think most T's will sound like that if your run it with a wheel jacked up. How does it sound while driving?
Hal- it makes that grinding noise on and off, which is why I jacked it up..to get a closer analysis.
I agree with Hal Schedler - typical sound if one wheel is jacked up.
Drive the car and listen to what is sounds like under load.
I have both wheels jacked up level- should that replicate the road noise, except without load?
Sounds to me like to much clearance between ring and pinion gear. KGB
Keith- meaning my pinion needs to be deeper inside the rear end?
Or ring gear closer to pinion, would have to see to be sure. I always set them up with one housing and the drive shaft in place for initial check. Really hard to say with out seeing how it looks. If you are using the modern pinion set up my luck has always been that the thick washer was all that was needed to get the depth. I also use the modern thrust bearings which are pretty much plug and play, many here will not use those but after over 150k between two cars I wont use any thing else. Let us know. KGB
I got a grinding noise when turing and found that it was a brake dragging on the wheel
A bit of adjustment and everything is OK
In the video near the beginning you show a view of the left wheel. At that point it looks as though the drum is wobbling and not on all the way. I would suspect that maybe your key is not in the groove but that the hub is cocked on that side. If that is not the problem at least I don't think that wheel is on straight for whatever reason.
It's nothing to do with the wheels. Your ring & pinion mesh is not right.
Easy to check the rear gear noise. Use the 'ear' method to pinpoint noise. Find a long shaft screwdriver or rod that has metal end on the handle . Place hand over the end with thumb raised so that the thumb knuckle is resting in your ear canal.
Then fix the opposite end of the 'hearing tool' to the pumpkin, test right and left sides, using the tool like a stethoscope
You will quickly locate the sound source and louder on the left means ring gear noise. Good way to test for where sounds are coming from on machinery.
Just for fun - try applying the emergency brake partway and see if that changes the noise.
Update: I removed my rear wheels and shot another video. With the wheels gone that loud grinding is greatly reduced, I can hold a metal screwdriver to the pumpkin and hear a low rumble/growl but nothing loud.
Whaddya think? Pull the rear off anyway?
Here is a video:
I would be pulling it down anyway for a better left axle and check the rest out!
James, when you pulled off the wheels/hubs, did you find any evidence of anything that might have been rubbing on the inside?
My 1921 sounded just like that. Turned out there was NO lubricant in the rear end. Check that if you have not already.
I added the 600w rear end lube myself, so that's good. When I pulled off the wheels no, I didn;t find any evidence of rubbing or scraping. The left wheel makes a grinding noise and when I used a metal screwdriver to listen- it seems to be comning from the wheel area itself???
I wonder if the bearings in the wheel are dry?
Your left axle looks bent. Notice how true the right one runs. That would also be the cause of the wheel wobbling in your first video. That bend would also put a strain on the bearings both inside and outside so check them while you have it apart. You might need to replace them too.
I'm sorry to say this, but you need to disassemble the whole rear end to replace that axle.
Incidentaly, the left side of the pumpkin was no louder than the right...so I am wondering if the noise is a new roller bearing? I didn't have original good ones so I bought new ones from a supplier for my outsides.
Okay, I pulled it all off the car and yanked the axle apart from the rear and here is what I found....see if you see it as well? It LOOKS like the pinion shaft was rubbing on the carrier to me.
Do you fellers agree?
Have you actually tried driving the car the way it is? It really doesn't matter how it sounds on jackstands.
Yes, many times which is why I began to ask about the grinding noise. Prior to the rebuild the car was perfectly quiet...then afterwards the grinding noise bothered me so much that I began this post.
I doubt the pinion/carrier theory. If that was happening, why isn't the cotter pin damaged? It looks OK in the picture.
I have never used a new roller bearing, but I have seen them. They are solid rollers while the original ones are spiral shaped. The original would allow a little give in the bearing, but the straight ones would need to have perfect alignment of all parts to get everything to run smoothly.
That left axle is definately moving up and down as it turns. That could be caused by a problem with the left inner bearing. If the inner bearing is moving up and down, the carrier would also be moving. That would result in intermittant misalignment of the ring and pinion gears.
As an aside, did you replace the gears? Often there is a groove worn in one or both gears and attempts to align them will make it ride on the high spot. That would also make a rough running and noisy axle.
Anyway, I still think there is something with the left axle and/or the bearings in the left side.
Norman- no I used the original gears, and my inner bearing on that left side is a good original Ford roller bearing. But I'll look and see what's going on inside on your idea. Thanks- Jim
I also think, while I have the whole thing taken apart, I'll try and snag some old Ford roller bearings for the outside rears. In a pinch, I bought new-made ones without the grooves and I know that isn't best. So, if anyone has two rollers for sale...please holler. I am wondering if that outside bearing was too stiff and was causing wobbling problems because it wouldn't flex like the originals?
Did you replace the sleeves? If they are worn, that could also be the cause of the problem.
On the gears, I like to put prussian blue on one gear and then make a complete rotation of the ring gear. The blue should be spread evenly on the surface of the gear. If you find it just hits high spots, you need to re adjust the gears. The gears wear to fit and when you put them back trying to use the original specifications, they don't fit right.