Opinions on Propshaft “Rubber” Couplings!
#61
Melting Slicks
You can have the set I have, they would probably be a week shipping or you could visit Tom & go thru the bucket
#62
Safety Car
Tom sells used couplers(he claims they are late model low mileage ) for 100 bucks a pair. He sent me a set, when I had my bent & twisted TT apart, the couplers looked as new so I re assembled. I tried to find & verify dates codes with no luck, I didn't spent a lot of time trying.
You can have the set I have, they would probably be a week shipping or you could visit Tom & go thru the bucket
You can have the set I have, they would probably be a week shipping or you could visit Tom & go thru the bucket
I should give the old classmate a call!
Ron
#63
Race Director
Member Since: Apr 2007
Location: South Western Ontario
Posts: 11,061
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It would seen to me with the little engineering / physics 101 I've studied that in 1st gear the torque applied by the input shaft, i.e. TT assembly,is reduced then multiplied through through TC and transmission to the rear wheels. It would be in the highest gear that the most torque would be applied to couplers...and we drive up there a lot.
In the BMW, the coupler is after the transmission so the engine can apply the most torque to the coupler when the car is in first gear due to first gear giving the most torque multiplication. It was very nice of you to misread my post and then make a clown remark about it assuming it was referring to the Vette torque tube.
And you are quite correct about the driving style having a large effect. In stock C5 form, constant shock loads every take off and shift would likely do more damage then steady power while accelerating.
Last edited by lionelhutz; 05-16-2012 at 05:48 PM.
#64
I haven't read anything bad about it, but I doubt there is a large installed base of them. Haven't really read anything good either, just that a few people have installed them. Personally, it makes the shaft solid so installing solid couplers shimmed to make the whole shaft assembly true would likely give similar results.
Our take on the situation is that you've really got 2 choices for driveshaft couplers. Either OEM or our Carbon Fiber Driveshaft with Flex disks. Solid Billet couplers that don't allow for angular differences in our experience will eventually fatigue parts, and the 6 shooter style with poly inserts isn't the most durable with the heat generated by track days. Our Carbon Fiber driveshafts really are pretty much bulletproof. We really do love the CF Driveshafts because once they're properly installed we've never had to worry about issues with them down the road.
Flex Disk as included with our Carbon Fiber driveshafts
#67
Safety Car
Ron
#68
Platinum Supporting Vendor
#69
Tech Contributor
We've upgraded our couplers since then. We have an improved stock style coupler as well as an upgraded coupler. Both have 10mm and 12mm hole versions.
#70
Racer
The key to our Carbon Fiber driveshaft system isn't just the carbon tube or the drive ends themselves, but rather the custom machined Flex Disks we've designed to accommodate the angular differences as explained in the first post.
Our take on the situation is that you've really got 2 choices for driveshaft couplers. Either OEM or our Carbon Fiber Driveshaft with Flex disks. Solid Billet couplers that don't allow for angular differences in our experience will eventually fatigue parts, and the 6 shooter style with poly inserts isn't the most durable with the heat generated by track days. Our Carbon Fiber driveshafts really are pretty much bulletproof. We really do love the CF Driveshafts because once they're properly installed we've never had to worry about issues with them down the road.
Our take on the situation is that you've really got 2 choices for driveshaft couplers. Either OEM or our Carbon Fiber Driveshaft with Flex disks. Solid Billet couplers that don't allow for angular differences in our experience will eventually fatigue parts, and the 6 shooter style with poly inserts isn't the most durable with the heat generated by track days. Our Carbon Fiber driveshafts really are pretty much bulletproof. We really do love the CF Driveshafts because once they're properly installed we've never had to worry about issues with them down the road.
#71
Le Mans Master
Member Since: Dec 2006
Location: Phoenix Arizona
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old thread no info motor mounts for drive shaft bushings !
Hey Guys!
Belonging to a racing club and instructing at three other ones, we go through a lot of these. Some guys use aluminum other use poly and some use stock, some use BMW and the rich guys use the carbon fiber shaft.
But we have all finally figured out one common problem in both C5 and C6. If you have old dried up or cracked/broken motor mounts, you going to break the rubber bushings on the driveshaft and the carbon fiber shaft will fail and on and on! Even our clutches and transmissions and rear ends have gotten killed with bad motor mounts!
So guess what? Nobody owns a C5 that does not need the motor mounts replaced and most C6's need 'em too
So do your motor mounts! or you will have to RnR your torque tube 3 times like i did! Dang!
G/L and Haul ***!
Belonging to a racing club and instructing at three other ones, we go through a lot of these. Some guys use aluminum other use poly and some use stock, some use BMW and the rich guys use the carbon fiber shaft.
But we have all finally figured out one common problem in both C5 and C6. If you have old dried up or cracked/broken motor mounts, you going to break the rubber bushings on the driveshaft and the carbon fiber shaft will fail and on and on! Even our clutches and transmissions and rear ends have gotten killed with bad motor mounts!
So guess what? Nobody owns a C5 that does not need the motor mounts replaced and most C6's need 'em too
So do your motor mounts! or you will have to RnR your torque tube 3 times like i did! Dang!
G/L and Haul ***!
Last edited by rustyguns; 12-29-2013 at 02:50 AM.
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