Driveshaft and coupler problems
Thread Starter
Instructor
Joined: Jun 2010
Posts: 162
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Driveshaft and coupler problems
Guys I have a quick question. I did a search and didn't see exactly what I am looking for. I have a '03 Z06 with a ttix kit that just made 890 whp on a dynojet the other day. Needless to say I had clutch problems and picked up a vibration. Of course I though it was the couplers. I removed the clutch and torque tube last night. The clutch problem is from a leaking rear main seal. The torque tube couplers need replaced but here is the question. There is a plastic guide or ring in the middle of the driveshaft. That has been rubbing only on one side. Is this just a result of the bad couplers or is the driveshaft bent.
Race Director
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
It can do that due to high rpm's. Every shaft turns into a skipping rope when it reaches a certain rpm. You just need to check the shaft for run-out. A couple of V blocks and a dial indicator would do it.
Thread Starter
Instructor
Joined: Jun 2010
Posts: 162
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Thanks for the info. I will check it today. Do you know what the acceptable limit is for a driveshaft. I am guessing under .005?
Race Director
Joined: Dec 2004
Posts: 13,760
Likes: 75
From: Haymarket VA
Agreed. Mine walked all the way to the end of the shaft but the prop shaft was straight. I replaced the bushings with DSS poly bushings and I highly recommend them for your use.
Melting Slicks
Joined: Jun 2012
Posts: 3,163
Likes: 6
From: Oceanside California
I got a complete bearing and poly coupler kit from RMP transmission on the way right now. I also got their converter drive plate, but you wont need that for the M6. Id give them or RKT a call and discuss what to do while its opened up. What upgrades to the transmission and diff do you have? Do you at least hardened input and output shafts?
Thread Starter
Instructor
Joined: Jun 2010
Posts: 162
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Well I checked the run out during lunch. .018. I guess that is out of spec. I can't find a spec but that seems like too much to me. Any way to answer your question. The trans is a stock M12. The rear has hardened shafts and the C6 Z06 springs and clutch set. I also have a DTE strut brace. I have a TH400 conversion for the car but I really like shifting and take it to the beach a couple of times a year. Without the overdrive it is not too practical but will be great for the track. I haven't decided what to do yet tr6060, 4l80, or th400.
