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Author
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Topic: Rear end bearings or wheel bearings?
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mach1driver
Journeyman Posts: 64
From: charlotte nc
Registered: Aug 2004
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posted 04-13-2005 05:03 PM
   
I had 3.89 gears installed / replace the 2.75
I am happy with the pull and it still cruises fine. There is a new noise though. Sounds like a wheel bearing when you get to 2500 rpm and above. It is definately coming from the rear of the car. Seems like a big coincidence for the wheel bearings to start making noise now. My receipt shows 9" pinion bearing. I paid $189 for the Richmond gear, $175 labor and $19 fir a Ratech shim kit, whatever that is.I feel like a got a pretty good deal, if I can get them to take care of the noise.
Are there bearings in the rear end? I am wondering if they could have put them back in wrong.http://home.earthlink.net/~mach1driver/
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Moneymaker
Administrator Posts: 26065
From: Lyons, IL, USA
Registered: May 99
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posted 04-13-2005 05:06 PM
Need more info.
Try putting the clutch in or putting the car in neutral when you hear the noise.
See if it goes away or changes pitch at all.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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mach1driver
Journeyman Posts: 64
From: charlotte nc
Registered: Aug 2004
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posted 04-13-2005 05:11 PM
quote:
Originally posted by Moneymaker:
Need more info.
Try putting the clutch in or putting the car in neutral when you hear the noise.
See if it goes away or changes pitch at all.
When I am doing 2500 RPMs, around 40 MPH, is it
okay to put it in nuetral? I have an automatic
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gjz30075
Journeyman Posts: 51
From: Roswell, Ga.
Registered: Apr 2004
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posted 04-13-2005 07:28 PM
Sure, you can put it in neutral, just make sure you take your foot off the gas! See if the noise changes with road speed, ie, does the noise pitch go down as the car is slowing down?The diff has several bearings in it and any or all could be bad, or the gear mesh isn't quite right. That, too, will make a similar noise.
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mach1driver
Journeyman Posts: 64
From: charlotte nc
Registered: Aug 2004
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posted 04-13-2005 07:46 PM
quote:
Originally posted by gjz30075:
Sure, you can put it in neutral, just make sure you take your foot off the gas! See if the noise changes with road speed, ie, does the noise pitch go down as the car is slowing down?The diff has several bearings in it and any or all could be bad, or the gear mesh isn't quite right. That, too, will make a similar noise.
Thanks gjz30075, It is raining hard today. I will try it tomorrow. I can tell you when I was driving it the other day, the noise decreased as I slowed down, took my foot off the gas.
what do you mean the gear mesh isn't right?
I am new at this.
Moneymaker, thanks for you reply too. I always value your opinions/advice
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Clark
Gearhead Posts: 686
From: Rowlett,Texas
Registered: Aug 99
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posted 04-14-2005 01:20 PM
Just adding to the already good advice, the way the ring gear meshes with the pinion gear is adjustable and critical. I have a set of 3.50 gears that are noisy on accel, but as soon as I let off the gas they go quite. Took the pinion out and saw a good pattern on the coast side, but the drive side not so good. Take it for the drive and let us know. ------------------
69 393W Sportsroof Deluxe
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mach1driver
Journeyman Posts: 64
From: charlotte nc
Registered: Aug 2004
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posted 04-14-2005 05:28 PM
quote:
Originally posted by Clark:
Just adding to the already good advice, the way the ring gear meshes with the pinion gear is adjustable and critical. I have a set of 3.50 gears that are noisy on accel, but as soon as I let off the gas they go quite. Took the pinion out and saw a good pattern on the coast side, but the drive side not so good. Take it for the drive and let us know.
I just drove it. when I put it in neutral the noise goes away. The noise starts around 2500
rpms. If I get up to 2500 and take my foot off the gas, it goes quiet. If I get it to 3500 rpms and let off the gas, it goes quiet when it gets below 2500. if i put in neutral at 3500 rpm, goes quiet immediately. Does this mean it is definately a problem in the rear end, as opposed to wheel bearings?
Thanks all!
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Clark
Gearhead Posts: 686
From: Rowlett,Texas
Registered: Aug 99
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posted 04-14-2005 09:45 PM
I am no expert but it sounds like it could be the gear setup. I would also like to know if this was happening before the gear change? If it was your U-joints it would be the same in neutral or drive because the shaft is always spinning.It is possible to be wheel bearings but just pulling the axles usually would not induce this, I hope others will weigh in that have more experience. ------------------
69 393W Sportsroof Deluxe
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mach1driver
Journeyman Posts: 64
From: charlotte nc
Registered: Aug 2004
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posted 04-15-2005 08:46 AM
quote:
Originally posted by Clark:
I am no expert but it sounds like it could be the gear setup. I would also like to know if this was happening before the gear change? If it was your U-joints it would be the same in neutral or drive because the shaft is always spinning.It is possible to be wheel bearings but just pulling the axles usually would not induce this, I hope others will weigh in that have more experience.
Clark, it is a new noise that started happening after the gear change. The shop wants to put something called shock proof in it. I think it is some kind of libricant
thanks
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gjz30075
Journeyman Posts: 51
From: Roswell, Ga.
Registered: Apr 2004
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posted 04-15-2005 12:53 PM
Did the shop ride with you to hear the noise? I suspect a gear mesh issue and sounds as if the shop might be trying to cover the noise with something. Try having a different shop do some diagnosis. Have them ride with you.
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mach1driver
Journeyman Posts: 64
From: charlotte nc
Registered: Aug 2004
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posted 04-16-2005 08:32 AM
quote:
Originally posted by gjz30075:
Did the shop ride with you to hear the noise? I suspect a gear mesh issue and sounds as if the shop might be trying to cover the noise with something. Try having a different shop do some diagnosis. Have them ride with you.
Yes, he said it could be a wheel bearing. He also said that if he puts shock proof in the rear end and noise still there, it would prove that the problem is wheel bearings. Didn't make much sense to me.
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Clark
Gearhead Posts: 686
From: Rowlett,Texas
Registered: Aug 99
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posted 04-16-2005 10:37 PM
Don't know what this shock proof is but it does sound a little strange. I know when I confirmed mine I just took loose the u-joint Removed the bolts on the pinion and pulled it out. You can confirm what the wear pattern looks like I think you might see the drive pattern off in your case.
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sprcoop
Gearhead Posts: 395
From: Tucson, AZ usa
Registered: Jan 2000
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posted 04-17-2005 01:45 AM
This has got to be what he is talking about.http://marketplace.s2ki.com/s2ki/product.php?productid=53&cat=24&page=1
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mach1driver
Journeyman Posts: 64
From: charlotte nc
Registered: Aug 2004
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posted 04-17-2005 09:07 AM
quote:
Originally posted by Clark:
Don't know what this shock proof is but it does sound a little strange. I know when I confirmed mine I just took loose the u-joint Removed the bolts on the pinion and pulled it out. You can confirm what the wear pattern looks like I think you might see the drive pattern off in your case.
Is that something he should be able adjust?
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Clark
Gearhead Posts: 686
From: Rowlett,Texas
Registered: Aug 99
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posted 04-17-2005 04:08 PM
Yes, this is adjustable they might be able to add or subtract the shim on the pinion depth but if not they will have to drop the third member back out. This shockproof sounds interesting, but if it makes any difference in the noise level, than they do have the gear mesh set wrong. I quess I am an old timer because I have bought Fords all my life and never needed some special lube to make the gears quiet.
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mach1driver
Journeyman Posts: 64
From: charlotte nc
Registered: Aug 2004
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posted 04-18-2005 04:48 PM
quote:
Originally posted by Clark:
Yes, this is adjustable they might be able to add or subtract the shim on the pinion depth but if not they will have to drop the third member back out. This shockproof sounds interesting, but if it makes any difference in the noise level, than they do have the gear mesh set wrong. I quess I am an old timer because I have bought Fords all my life and never needed some special lube to make the gears quiet.
Clark, I don't like the idea of shock proof either. I am looking for a new mechanic. I do jobs that I know I can handle, like brakes, but have never worked on a rear end gear. Do you think this is something I could adjust myself.
Thanks, Scott
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