REAR END CLUNKING NOISE??
Thread Starter
Le Mans Master
Joined: Jan 2001
Posts: 6,938
Likes: 1
From: San Diego CA
REAR END CLUNKING NOISE??
When I engage the clutch there is a clunk from the right rear. Sounds like a loose mount versus grinding gears. lifted up whole rear end and rechecked my work on rear leaf spring install, no problems, yokes seem solid no end play. Unable to duplicate sound with engine on in nuetral. Unwilling to safely be under car and engage clutch while trusting 2 jackstands versus my life. No idea what it is but it happens regardless of turning left/ right or going straight. As soon as I engage the clutch and the driveline takes the torque of the engine there is a clunk and no noticible hesitation. Any ideas? :confused:
Racer
Joined: Sep 2002
Posts: 252
Likes: 0
From: wellington N Zealand
Re: REAR END CLUNKING NOISE?? (Cali,77,L-82)
The clunk could be anything as its caused by a worn part taking up slack.
High probability would be one of the universals.
Dont forget to check your drive shaft. If your rear end is tight then that could be probable.
If no joy try giving your diff an oil change.
Do it once.. Do it RIGHT.
:cool: :cool: :cool:
High probability would be one of the universals.
Dont forget to check your drive shaft. If your rear end is tight then that could be probable.
If no joy try giving your diff an oil change.
Do it once.. Do it RIGHT.
:cool: :cool: :cool:
Drifting
Joined: Feb 2000
Posts: 1,607
Likes: 0
From: Clarksville,Tn,USA TN
Re: REAR END CLUNKING NOISE?? ('79ProwlerOrange)
David,
Look at the snubber bushing. It is the bushing that connects the rear end to the crossmember. When the drive line torques up if the bushing is worn it will clunk also as it raises up or down. Sometimes you can see the space with a flashlight or see it move when someone puts it in gear.
Neil in Tenn
Look at the snubber bushing. It is the bushing that connects the rear end to the crossmember. When the drive line torques up if the bushing is worn it will clunk also as it raises up or down. Sometimes you can see the space with a flashlight or see it move when someone puts it in gear.
Neil in Tenn
Melting Slicks
Joined: May 1999
Posts: 2,897
Likes: 0
From: Moon Township PA
Re: REAR END CLUNKING NOISE?? (Nomad78SA)
Nomad78SA hit the nail right on the head, if I read your symptoms right. Engaging the clutch (we are talking about as you let the clutch pedal out, right?) and either accelerating or decelerating cause the engine to torque or twist. That twisting moment is usually absorbed by the front differential snubber. This is a rubber doughnut with a steel insert, an "engine mount" for the differential, if you will. If the front bushing is worn, or even trashed, you will get a metal-to-metal clunk as the two pieces lift off of each other and then come back together. Do you have an Assembly Instruction Manual? It clearly shows the components, their order of assembly, and where they go on the differential.
This is an easy job, requiring basic tools, but it is also a PITA because of the tight quarters you have to work in. Anybody can do this and the parts are readily available at most catalog stores.
Gary
This is an easy job, requiring basic tools, but it is also a PITA because of the tight quarters you have to work in. Anybody can do this and the parts are readily available at most catalog stores.
Gary
Thread Starter
Le Mans Master
Joined: Jan 2001
Posts: 6,938
Likes: 1
From: San Diego CA
Re: REAR END CLUNKING NOISE?? (GaryS)
I have the entire Energy suspension kit sitting in the garage. Have used/ installed only the sway bars, pitman, drag link, rear spring ,tranny poly bushings so i should have the snubber bushing in the kit. I do not know which bushing it is, could you please specify it's location or does anyone have a digital picture.
P.S. going to check the drive shaft just in case becuase I did just put in the tranny bushing and had to jack up the tranny a few inches to leave enough space to pull and fit the new (unsquashed) bushing in, may have done something to the drive shaft universals.
P.S. going to check the drive shaft just in case becuase I did just put in the tranny bushing and had to jack up the tranny a few inches to leave enough space to pull and fit the new (unsquashed) bushing in, may have done something to the drive shaft universals.
Thread Starter
Le Mans Master
Joined: Jan 2001
Posts: 6,938
Likes: 1
From: San Diego CA
Re: REAR END CLUNKING NOISE?? (Cali,77,L-82)
Came home for lunch, not the driveshaft (as far as I can tell with car not jacked up), no time to jack up car yet but will check rear snubber this evening.
David
David
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Drifting
Joined: Aug 2002
Posts: 1,731
Likes: 22
From: Marietta Ga.
Re: REAR END CLUNKING NOISE?? (Cali,77,L-82)
They are talking about the front of the pumpkin. the bracket attached to the rear end has this bushing to attach to the frame cross member. you can lie on the groung beside the car and have some one shif back and forth and see the front end of the diff jump up and down if it's loose, otherwise you will see nothing. The bushing is shown in most all the catalogs with the rear end components.
Melting Slicks
Joined: Dec 1999
Posts: 2,116
Likes: 156
From: Mid West
Cruise-In III Veteran
Re: REAR END CLUNKING NOISE?? (Cali,77,L-82)
I agree with the others about the front differential mount, but in addition to the just checking the bushing also check the 3 bolts that hold the bracket to the differential (1 through bolt, and 2 smaller ones). The 2 smaller bolts came loose on my car and allowed the differential to move around when I accelerated & braked. It made a deep thumping sound in the rear of the car. Good Luck. :cheers:
Drifting
Joined: Aug 2002
Posts: 1,731
Likes: 22
From: Marietta Ga.
Re: REAR END CLUNKING NOISE?? (72GACRZR)
OK Go here to CC http://www.parts123.com/PartFrame.as...rvette_Central
And change the search to by part # and type in 582122 and you can see a picture.
And change the search to by part # and type in 582122 and you can see a picture.
Thread Starter
Le Mans Master
Joined: Jan 2001
Posts: 6,938
Likes: 1
From: San Diego CA
Re: REAR END CLUNKING NOISE?? (Jason Staley)
Okay not snubber bushing. Had no help so physically left a screwdriver to block carb at 1000 RPM so would not stall in first gear with no one at the gas pedal. Back end up on jacks and HOWL!!!! from right rear wheel. No one was available to check putting Vette in and out of gear so left it spin in 1st gear. Not the rear end but either the wheel bearing or universal connecting half shaft to right wheel bearing. Sounded like metal to metal contact, got louder and ran to shut off ignition, any ideas?
:rolleyes: :rolleyes:
[Modified by Cali,77,L-82, 8:30 PM 10/15/2002]
:rolleyes: :rolleyes:
[Modified by Cali,77,L-82, 8:30 PM 10/15/2002]
