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Joined: Apr 2007
Posts: 19
Grease Monkey
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Grease Monkey
Joined: Apr 2007
Posts: 19 |
For a while now, I have noticed a "bink bink bink.." noise coming from my car as it rolled, either forward or reverse, at low speeds.
From the tone and location, I initially thought it was simply a pebble, or piece of crap rollling around inside a hubcap, giving the tinny noise as the wheel spun.
I got the car in the air, and spun the rear end, only to discover the noise was coming from the rear of the transmission, the original iron powerglide.
I pulled the drive shaft, and checked universals, finding them good and tight. I listened closer, and the noisse seems to be coming from the tailshaft area of the transmision.
I disconnected the speedo drive, and removed the gear, but there was no effect on the noise.
The noise occurs about, but not exactly every half turn of the driveshaft.
Performance of the tranny does not seem to be affected.
Any comments/ideas before I pull things apart???
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Willwood Engineering
Wilwood Engineering designs and manufactures high-performance disc brake systems.
Wilwood Engineering, Inc. - 4700 Calle Bolero - Camarillo, CA 93012 - (805) 388-1188
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Joined: Nov 2001
Posts: 19,758 Likes: 64
ChatMaster - 15,000
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ChatMaster - 15,000
Joined: Nov 2001
Posts: 19,758 Likes: 64 |
I would check the fit of the splines on u-joint to tail shaft. If there is any appreciable wiggle then it likely is the problem. If tight and it slides easily in and out then it may not be the problem.
How Sweet the roar of a Chevy four!
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Joined: Dec 2001
Posts: 10,379 Likes: 1
Technical Advisor ChatMaster - 10,000
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Technical Advisor ChatMaster - 10,000
Joined: Dec 2001
Posts: 10,379 Likes: 1 |
I vote for a broken flex plate or loose bolts from the torque convertor to the flex plate.  
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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Joined: Nov 2001
Posts: 19,758 Likes: 64
ChatMaster - 15,000
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ChatMaster - 15,000
Joined: Nov 2001
Posts: 19,758 Likes: 64 |
Ray may be right on this one. Both times I have had a cracked flex plate it was a click type sound. It was most noticable at low speeds and seemed to go away as speed was increased. The cracks and breaks were on the center bolts that attach the flex plate to the crankshaft.
How Sweet the roar of a Chevy four!
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Joined: Apr 2007
Posts: 19
Grease Monkey
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OP
Grease Monkey
Joined: Apr 2007
Posts: 19 |
I think I can eliminate the converter to crank connection, since the noise was evident when spinning the driveshaft with the tranny in neutral. The crank ans outer shell of the converter should not have been moving. Plus the noise is defifitly in sync with driveshaft, not motor speed.
I think I have to find a good diagram of a powerglide, and figure what is spinning at about twice driveshaft speed toward the rear of the tranny.
Thank you for the help, and please keep the coments coming.
PS. Any leads on a repairman for an original tube radio would be appreciated. The radio still works, but reception has definitly gotten worse over the last couple of years.
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Joined: Dec 2001
Posts: 10,379 Likes: 1
Technical Advisor ChatMaster - 10,000
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Technical Advisor ChatMaster - 10,000
Joined: Dec 2001
Posts: 10,379 Likes: 1 |
You may want to contact the chevradioman with your problem. You should see his name on several posts.
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
Remove and inspect the trasmission governor ...try it with the gov. removed. Also check bolts on rear pump.
Gene Schneider
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Joined: Apr 2007
Posts: 19
Grease Monkey
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OP
Grease Monkey
Joined: Apr 2007
Posts: 19 |
Thanks for the suggestion. After reading it, and looking over a picture of the powerglide's innards, I strongly suspect the governor is the problem. I suspect my noise is from the weights flopping around at low speed. The noise seemed to be coming from right around the area of the cover over the governor.
As soon as I wrap up a project on my ratty Vette, and free up my lift, I'll pull the governor and hopefully confirm the problem.
Thanks again.
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
The noise is more or less normal. Dosen't indicate a problem. :)
Gene Schneider
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Joined: May 2002
Posts: 167
Shade Tree Mechanic
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Shade Tree Mechanic
Joined: May 2002
Posts: 167 |
When you remove the gov cover, take notice to see that the small nylon rubbing insert is in the outer end of the gov. It just snaps into the end of the gov. That could be transfering the weight dropping noise....
Any man that thinks he is too old to learn something new probably always was
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Joined: Apr 2007
Posts: 19
Grease Monkey
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Grease Monkey
Joined: Apr 2007
Posts: 19 |
So, more than a year after first complaining of my annoying noise, I finally put my '55 on the lift and puled the four bolts on the governor cover, and pulled the unit out.
It looks absolutely great, no wear evident, and all there as far as I can tell. However, I am sure the noise I was hearing was in fact the governor weights flopping with every revolution. Also, the low to high shift point seems to be at a bit higher than comfortable speed.
I guess I am looking for advise on if this noise is common to powerglides? If not, is there something that keeps the weights from flopping? Or, is the noise and flopping weights just a symptom of another tranny problem that may be resulting in my high shift points?
Thanks.
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
There is nothing that keep the weights from floping. Usually you can not hear them except under very "ideal" conditions. The govorner controls just the maximum up shift speed which would be 55 MPH with the stock V8 gov. To lower your up shift speed for mid range lengthen the lower rod connected to the lever on the side of the carburetor. Go about 2 turns at a time (I assume that you have an 8 Cyl. engine)
The alternative would be to try a different gov.
Is the nylon thrust plug between the cover and the gov. in place?
Last edited by Chev Nut; 11/10/08 11:57 AM.
Gene Schneider
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Joined: Apr 2007
Posts: 19
Grease Monkey
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Grease Monkey
Joined: Apr 2007
Posts: 19 |
The nylon thrust plug is in place. The car has an extremely quiet 265, and the pinging is only heard at about walking speeds, which is about the speed I pull out of the local cruise nights around here. Being the only noise from an otherwise silent car, it just grates at my nerves.
Guess I'll just live with it.
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