Never Never Never run the car with the wheels just hanging. A sure fire way to destroy the ujoints.
Rear Differential Noise
Thread Starter
Instructor
Joined: Mar 2008
Posts: 221
Likes: 0
From: Farifax Station VA
Rear Differential Noise
So I though I was done tearing into my '77 -- NO!
Gary did an awesome job rebuilding my steering box, which I got back last week. I replace all of the PS components and box...cleaned'r up and after a 30 minute drive, pulled into my driveway and heard a rhythmic "clanking" noise, which I though was from the right rear brake caliper (I replaced all of the calipers about 2 weeks ago). I lifted the car and check both calipers, they were good. With the rear wheels off the ground, I started the car and put it into drive and let the rear wheels spin freely. I think the sound is coming from the differential -- what are some commong failures, I could try to go look for?
I am going to change the fluid first since I have not done that yet. How do I know if mine has positraction??
Gary did an awesome job rebuilding my steering box, which I got back last week. I replace all of the PS components and box...cleaned'r up and after a 30 minute drive, pulled into my driveway and heard a rhythmic "clanking" noise, which I though was from the right rear brake caliper (I replaced all of the calipers about 2 weeks ago). I lifted the car and check both calipers, they were good. With the rear wheels off the ground, I started the car and put it into drive and let the rear wheels spin freely. I think the sound is coming from the differential -- what are some commong failures, I could try to go look for?
I am going to change the fluid first since I have not done that yet. How do I know if mine has positraction??
Last edited by TyCor; Jun 1, 2008 at 09:05 PM. Reason: Spelling
Le Mans Master
Joined: Jan 2000
Posts: 8,918
Likes: 27
From: New Hill NC
So I though I was done tearing into my '77 -- NO!
Gary did an awesome job rebuilding my steering box, which I got back last week. I replace all of the PS components and box...cleaned'r up and after a 30 minute drive, pulled into my driveway and heard a rhythmic "clanking" noise, which I though was from the right rear brake caliper (I replaced all of the calipers about 2 weeks ago). I lifted the car and check both calipers, they were good. With the rear wheels off the ground, I started the car and put it into drive and let the rear wheels spin freely. I think the sound is coming from the differential -- what are some commong failures, I could try to go look for?
I am going to change the fluid first since I have not done that yet. How do I know if mine has positraction??
Gary did an awesome job rebuilding my steering box, which I got back last week. I replace all of the PS components and box...cleaned'r up and after a 30 minute drive, pulled into my driveway and heard a rhythmic "clanking" noise, which I though was from the right rear brake caliper (I replaced all of the calipers about 2 weeks ago). I lifted the car and check both calipers, they were good. With the rear wheels off the ground, I started the car and put it into drive and let the rear wheels spin freely. I think the sound is coming from the differential -- what are some commong failures, I could try to go look for?
I am going to change the fluid first since I have not done that yet. How do I know if mine has positraction??
If you let the wheels hang and run it, you will get binding and clanking. I wouldnt trust that as a good test.
Thread Starter
Instructor
Joined: Mar 2008
Posts: 221
Likes: 0
From: Farifax Station VA
OK...
now I feel stupid. Good thing I only did that once. I have done some reading on the diff cushon, seems where is that located? Also, I am still trying to figure out if my car has posi...what's the trick?
now I feel stupid. Good thing I only did that once. I have done some reading on the diff cushon, seems where is that located? Also, I am still trying to figure out if my car has posi...what's the trick?
Melting Slicks
Joined: Dec 2006
Posts: 2,669
Likes: 3
From: Kingston Ontario
You drove the car for 30 minutes and when you pulled into your driveway you heard a clunking noise? So are you saying that this noise was noticeable throughout the drive or only when you were about to shut off the car?
I would suspect that if it's a driveline malfunction; you would have heard it during your drive. At any rate; I would leave the rear jacked up and level the halfshafts with jacks and rotate the assembly by hand only to determine the source of the noise.
I would suspect that if it's a driveline malfunction; you would have heard it during your drive. At any rate; I would leave the rear jacked up and level the halfshafts with jacks and rotate the assembly by hand only to determine the source of the noise.
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Melting Slicks
Joined: Dec 2006
Posts: 2,669
Likes: 3
From: Kingston Ontario
Yes , halfshafts are the drive shafts from the diff, connected to the u-joints, connected to the halfshaft to the wheel hubs. Leveling the halfshaft will allow the universal joints to turn freely without binding.
This picture should help;
http://www.zip-products.com/Zip/dept.asp?dept_id=2390
This picture should help;
http://www.zip-products.com/Zip/dept.asp?dept_id=2390
Last edited by dannyman; Jun 1, 2008 at 09:57 PM. Reason: add pix
