Poly Torque Tube bushing - anyone try these?
Race Director
Joined: Apr 2007
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From: South Western Ontario
Peter
Racer
Joined: Feb 2005
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From: Arlington Hts. IL
The bushings are there to eliminate drive line shock, to make the car a bit more pleasant to drive.Solid links would hold up better in all out racing but be less than pleasant on the street. Just like poly suspension bushings.
Tech Contributor
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From: Howell Michigan
St. Jude Donor '09-'10-'11
Tech Contributor
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From: Howell Michigan
St. Jude Donor '09-'10-'11
When do you here this rattle? If on start during a normal launch from a stop, this is normal for the vette. The owner's manual covers this.
Thread Starter
Melting Slicks
Joined: Dec 2002
Posts: 2,480
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From: Middletown DE
I finally pulled the Torque tube apart today and the one bushing is torn up a little bit, but not nearly as bad as i expected it to be.
These are the stock bushings with 90k total miles and 60k miles with 500 + HP. I do not take the car to the track alot, but it has seen a few passes over the years. Mostly just jumping on it here and there.
Still torn on what to replace them with.....
Also - anyone know the TQ specs for reassembly?
These are the stock bushings with 90k total miles and 60k miles with 500 + HP. I do not take the car to the track alot, but it has seen a few passes over the years. Mostly just jumping on it here and there.
Still torn on what to replace them with.....
Also - anyone know the TQ specs for reassembly?
Tech Contributor
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From: Howell Michigan
St. Jude Donor '09-'10-'11
Bearing Housing Assembly-to-Coupling Bolts 70 N·m 52 lb ft
Clutch Actuator Cylinder Mounting Bolts (Manual Transmission) 12 N·m 106 lb in
Coupling-to-Propeller Shaft Bolts 70 N·m 52 lb ft
Driveline Tunnel Closeout Panel Bolts 10 N·m 89 lb in
EBTCM LH Mounting Bracket Mounting Bolts 50 N·m 37 lb ft
Input Shaft Bearing Positioning Bolts 35 N·m 26 lb ft
Input Shaft-to-Coupling Bolts 70 N·m 52 lb ft
Clutch Actuator Cylinder Mounting Bolts (Manual Transmission) 12 N·m 106 lb in
Coupling-to-Propeller Shaft Bolts 70 N·m 52 lb ft
Driveline Tunnel Closeout Panel Bolts 10 N·m 89 lb in
EBTCM LH Mounting Bracket Mounting Bolts 50 N·m 37 lb ft
Input Shaft Bearing Positioning Bolts 35 N·m 26 lb ft
Input Shaft-to-Coupling Bolts 70 N·m 52 lb ft
Intermediate
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no its all the time and just a tiny little rattle from under the car and i doesnt seem to change much with rpm tho i cant really hear it well enough cuz its not extremely loud. the car only has 49k miles on it. maybe this is normal? kind of sounds like a when a bolt is loose just a little bit and it kind of rattles/buzzes but not extremely loud?
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Thread Starter
Melting Slicks
Joined: Dec 2002
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From: Middletown DE
Thanks Eric.... much appreciated!
leaning twards putting two rubbers back in... thinking the solid would put a bit more stress on the single rubber coupler.... and the stock ones appeared to hold up fine under my driving style
leaning twards putting two rubbers back in... thinking the solid would put a bit more stress on the single rubber coupler.... and the stock ones appeared to hold up fine under my driving style
Last edited by SmoothFRC; Mar 28, 2010 at 09:25 AM.
Tech Contributor
Joined: May 2008
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From: Howell Michigan
St. Jude Donor '09-'10-'11
no its all the time and just a tiny little rattle from under the car and i doesnt seem to change much with rpm tho i cant really hear it well enough cuz its not extremely loud. the car only has 49k miles on it. maybe this is normal? kind of sounds like a when a bolt is loose just a little bit and it kind of rattles/buzzes but not extremely loud?
Tech Contributor
Joined: May 2008
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From: Howell Michigan
St. Jude Donor '09-'10-'11
Thread Starter
Melting Slicks
Joined: Dec 2002
Posts: 2,480
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From: Middletown DE
Spoke to Rick over at Prothane today. He was telling me they have been making these couplers for other makes for a while (2010 Camaro, Dodge's, GTO's etc) and they have had nothing but great feedback. I know - he works there, what else is he going to say.
Anyway - he did confirm that this is indeed meant to be a midpoint of stock and solid bushings. This one for the corvette is still new to the market, but they expect it to be a good seller once some tuners get them running in their own cars. I spoke to Mike over at ECS and he said they had some on order to test in their personal vehicles.
Also - i spoke with Mike Yerger and he was telling me the cheaper "stock" bushings being sold are reproductions coming out of China, which are not holding up near as well as the ones made in Germany. Just a word of caution - if you are installing a set, make sure they have the stamp "made in germany"... (i guess the copies could have this also though?)
I did go ahead and order one of the poly's for the rear coupler, and will go with a stocker for the front. I daily drive my car (when the weather cooperates of course), so i will certainly have some feedback once i get the car back on the road.
John
Anyway - he did confirm that this is indeed meant to be a midpoint of stock and solid bushings. This one for the corvette is still new to the market, but they expect it to be a good seller once some tuners get them running in their own cars. I spoke to Mike over at ECS and he said they had some on order to test in their personal vehicles.
Also - i spoke with Mike Yerger and he was telling me the cheaper "stock" bushings being sold are reproductions coming out of China, which are not holding up near as well as the ones made in Germany. Just a word of caution - if you are installing a set, make sure they have the stamp "made in germany"... (i guess the copies could have this also though?)
I did go ahead and order one of the poly's for the rear coupler, and will go with a stocker for the front. I daily drive my car (when the weather cooperates of course), so i will certainly have some feedback once i get the car back on the road.
John
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From: Dyer, IN
Any additional details? Of the cars in which they have been installed, what HP/TQ levels are they at? Any testing on auto-x v/s drag cars?
Burning Brakes
Joined: Jan 2008
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From: Galaxy Traveler
Electron may have the same problem I had. My pilot bearing went away and allowed enough movement in the input shaft to eventually break the throw out bearing collar off of the slave cylinder. It was just floating there rattling away.
How many miles on the car at the time it broke? Any leading up to this happening?
Burning Brakes
Joined: Jan 2008
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From: Galaxy Traveler
