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11/29/09 2:03pm - Original Message: 'Rearend noise'
tinbender
Former Member
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edgwood, MD - USA

Vette(s):
1975 convertible,with the hard top and power streering.it a 350 L48 with auto trans. the color is light blue.

Joined: 11/1/2007
Posts: 736
 I put a post in acouple weeks ago about a noise coming from the right rear.I was told to check the universals and trailingarms. I did do this although the universals look old there is no signs of them being worn.I jacked up the car and looked for play,but  the wheels had no play in them. So now my puzzle the noise is only when I'm driving and only when stepping on the  gas pedel.When coasting no noise. I'm wondering if maybe the parking brake might be stuck alittle.
                                                             Rick
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11/29/09 4:48pm - Reply: 'Rearend noise'
Jeffm Gold Member
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Sebago Lake, ME - USA

Vette(s):
1978 Silver Anniversary L82 4spd (M21) Red Leather. -1978 Pace Car L82 4spd (M21) 20k miles.

Joined: 2/15/2007
Posts: 962
I had a parking brake that wouldn't release properly on one side. The center of the wheel would get really hot after a ride.

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11/29/09 4:53pm - Reply: 'Rearend noise'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19458
Refresh our memory...what kind of noise is it? Grind, howl, squeal, tick, bump, whine....Question

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Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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11/29/09 5:00pm - Reply: 'Rearend noise'
dskopp
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Oak Creek, WI - USA

Vette(s):
1981 Great White Shark. Red Interior, 350/190hp. PS, PB (SS), A/C CC, T-Tops, Going to remain as Stock as possible. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vetts Car Club. 175,000 Original miles!!

Joined: 5/21/2008
Posts: 1956
So, the noise is there just when you increase your speed??, but not when you are coasting??  Must be something related to the drice shaft !or something in the tranny?  I am just think9ing out laud.
Dan


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11/29/09 6:29pm - Reply: 'Rearend noise'
tinbender
Former Member
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edgwood, MD - USA

Vette(s):
1975 convertible,with the hard top and power streering.it a 350 L48 with auto trans. the color is light blue.

Joined: 11/1/2007
Posts: 736
 The best way I can describ the sound is a bird chirp sound.It's not constant ,kind like when something hitting a high spot on something.I seen sound transmitted thur metal at work,however this sound is coming from the right rear.But I double check and see if it's being trasmitted from somewhere else.

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11/29/09 10:25pm - Reply: 'Rearend noise'
KDADDY79
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Dutchess County, NY - USA

Vette(s):
White '79 Corvette. It's a driver.

Joined: 8/27/2007
Posts: 2484
I have to wonder if the rear diff. itsself is loose. (???)
That'd explain why it only makes noise when under acceleration...when pressure is being applied to it. Then when you're just coasting the noise disappears because it settles back down to where it's supposed to be.
Food for thought. Let us know.
Kevin


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11/30/09 8:06am - Reply: 'Rearend noise'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19458
Chirp-Chirp? Could be anything from a bad wheel bearing, u-joint, or something rubbing on the driveshaft, like the p-brake cable. Could also be something rubbing on the backing plate for the p-brake, or even a wheel rubbing on one of the calipers.
Just doing it while accelerating leads one to believe the offending component(s) is moving, as the front of the diff will do when under power, if the front diff cushion/bushing is worn.
 Usually, when I hear something that makes a "chirp" noise in the rear, it's a u-joint. They don't always have to be completely worn out to make noise...


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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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11/30/09 3:42pm - Reply: 'Rearend noise'
wetvet
Standard Member
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Lake Oswego, OR - USA

Vette(s):
1972 Steel Cities Gray T Top. Original Owner, Original Paint and Interior. The running gear has been rebuilt after 240,000 miles.

Joined: 10/17/2003
Posts: 540
[QUOTE=Adams' Apple]Chirp-Chirp? Could be anything from a bad wheel bearing, u-joint, or something rubbing on the driveshaft, like the p-brake cable. Could also be something rubbing on the backing plate for the p-brake, or even a wheel rubbing on one of the calipers.
Just doing it while accelerating leads one to believe the offending component(s) is moving, as the front of the diff will do when under power, if the front diff cushion/bushing is worn.
 Usually, when I hear something that makes a "chirp" noise in the rear, it's a u-joint. They don't always have to be completely worn out to make noise...
[/QUOTE]

The Chirp-Chirp is usually the rear wheel bearing inside the trailing arm. Shocked
Good to the this done this winter. Then you will be ready for the Gathering this summer.



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12/2/09 2:53pm - Reply: 'Rearend noise'
tinbender
Former Member
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edgwood, MD - USA

Vette(s):
1975 convertible,with the hard top and power streering.it a 350 L48 with auto trans. the color is light blue.

Joined: 11/1/2007
Posts: 736
I want to thank everyone for their input,looks like I'm going to be doing some rear end work over the winter.
                        Rick


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12/6/09 6:54am - Reply: 'Rearend noise'
nosal1 Gold Member
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Dunedin, FL - USA

Vette(s):
1980 Corvette Torch Red with Gold metallic 370HP/350 CU.IN.Turbo 350 w/shift kit.Originally CA.Car with 305 CU.IN.

Joined: 3/21/2006
Posts: 238
Good Morning All,
            I have had the chirping/clicking sound,usually on the right rear side wheel,and it is the "clutch pack" squeaking.
           You may need to drain and renew the rear end gear grease and the "Limited Slip Lube" from GM.
          It is essential to have the lube in the fluid of the rear end to keep the metallic material used for the clutches from chaffing.
           I do not know for sure if this is your situation,however have dealt with this on my Vette years ago and many others as well,and it is worth the effort to change rear end fluids and add this additive.It is about $8-10 per 4-6 oz. bottle..
           Like I said,it may not be your problem,however unless you have changed rear end juice,it would be to your advantage to do so.
           Good Luck and have a great day........
                  Sal c


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