Subject	Check the runout at either end of the shaft.
Posted by	Gordo NA2LS Daytona on March 27, 2019 at 9:51 AM
	This message has been viewed 347 times.
In Reply To	Drivetrain vibration at high speed causes? posted by ZEngineer on March 26, 2019 at 10:24 PM
Message	My situation was completely different, but the cause was determined by using a dial indicator at either end of the driveshaft. It turned out the bolt holes on the custom made D/S and the non-Z32 Q45 pinion flange were both 12mm in diameter; and I was still using the original NA 10mm bolts to clamp them together. I found the problem by checking for excessive runout of the shaft by using a dial indicator. Once the two parts were loosened, it was easy to see the problem; but tightened together, I'd have never suspected. _________________________________________________
Follow Ups	Drivetrain vibration at high speed causes? - ZEngineer 22:24:18 03/26/19 The mount is certainly not part of the solution, it's not - Bernie (NoVA) 22:53:03 03/26/19 I have stock NISSAN mounts on hand - can ship (n/m) - Bernie (NoVA) 22:53:29 03/26/19 I went back to an OEM 2pc drive shaft after running a 1pc - Polish 23:09:13 03/26/19 Thanks. That’s exactly the kind of experience I needed (n/m) - ZEngineer 23:12:50 03/26/19 I did the same thing. (n/m) - ZUL8TR 08:35:08 03/27/19 Where'd you find an OEM 2 piece? Used? New? I think I would - nissubaru 09:09:05 03/27/19 I kept mine, but I've seen several used for sale - Polish 10:45:08 03/27/19 it is ridiculously easy to have a shaft tested for balance - LJZTT 16:29:09 03/27/19 I'll know more once I do the trans mount and fluids. - nissubaru 08:41:53 03/28/19 Same - Metacom 11:15:38 03/27/19 the 2pc just has a higher tolerance for mis-alignment - LJZTT 16:36:18 03/27/19 I'm willing to bet most people who experience no such issues - LJZTT 16:39:56 03/27/19 Seems like I’ll be looking for OEM DS and trans mount (n/m) - ZEngineer 23:22:20 03/26/19 For a new CSB - Polish 00:22:33 03/27/19 I respect your ability to go rogue! :-) (n/m) - ZEngineer 00:30:50 03/27/19 Get the correct mount. 1 piece here for > 50000km - vorpalZed 23:45:41 03/26/19 Understood. If anyone has a good used one, email me pls (n/m) - ZEngineer 00:25:13 03/27/19 Install an automatic mount. Or go fancy and install - MixManMash 03:19:02 03/27/19 I’m surprised the U-joint can’t make up for the difference (n/m) - ZEngineer 03:28:13 03/27/19 I'd also check the u-joint for binding. That can cause a - MixManMash 03:57:44 03/27/19 Only the AT TT is the 40p00 mount since it's heaviest - Bernie (NoVA) 17:44:01 03/27/19 Woah, I didn't know the Nismo mount was no good - platinumist 10:17:58 03/27/19 If you want an upgrade, go with the automatic or the BDE - MixManMash 11:18:46 03/27/19 It's not that it is no good, it simply is not designed for - LJZTT 16:24:15 03/27/19 BDE Ordered lol. - platinumist 13:29:03 03/28/19 Check the runout at either end of the shaft. - Gordo NA2LS Daytona 09:51:45 03/27/19 Something else to consider >> - LitlElvis 10:50:59 03/27/19 This makes sense to me - Polish 12:06:06 03/27/19 that plus it is super easy to do what I did, especially if - LJZTT 16:27:31 03/27/19 OE engine mounts are a waste of money. - slayer fan 17:21:42 03/27/19 Steel, aluminum or CF driveshaft? (n/m) - Ghoztt 21:24:30 03/27/19 Steel, does it matter? (n/m) - ZEngineer 22:13:49 03/27/19 Each material has it's own harmonics or resonating frequency - Ghoztt 03:55:00 03/28/19 If the system is marginal enough - ZEngineer 13:00:50 03/28/19 Sent you an email (n/m) - Ghoztt 20:06:28 03/28/19 honestly the biggest benefit to going to 1pc over OEM 2pc - LJZTT 17:18:05 03/28/19 Balance it with hose clamps. No, it's not ghetto - Zxpress 19:16:39 03/28/19 That’s ghetto...I love it! :-) (n/m) - ZEngineer 10:38:10 03/29/19 Eat less beans. (n/m) - Yeehaw 09:55:16 03/30/19 Note when replacing the 2 piece DS the center support mount> - ZUL8TR 07:09:50 04/02/19
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