Subject	Spoke with Mike Smith @ JWT about his thoughts on this today
Posted by	Bernie (NoVA) on July 31, 2019 at 10:13 PM
	This message has been viewed 278 times.
In Reply To	98 j spec trans posted by Boostjuice on July 28, 2019 at 12:43 AM
Message	1. use the shipping fluid for break in. Top off w. Nissan fluid if needed. 2. he does not think that the noise is actually the bearing, its the gears getting too shinned up and their interface is getting polished 3. much like people complaining about gear whine from Leader gear 300HP / 300TQ break in on factory fluid is his recommendation He has taken 3 98+ transmissions apart and found the noise in the gears from the way they are meshing together. Gear metallurgy was changed in 98+, people are not breaking them in correctly, using the wrong fluid and they are overloading them with torque, this causes the oil to squeeze out from between the gears and they polish up and get noisy. Once the noise has set in no fluid change etc will help. It could be possible to take the gears off and have them shot peened to remove the polish and reassemble. He does not believe it has anything to do with a specific bearing failure. Bernie Bilski berniebilski@cox.net President of Z-Car Club of Northern Virginia 1995 Nissan 300ZX TwinTurbo in Cobalt Green 1997 Nissan 240SX SE in Ultra Red 2006 Nissan Frontier SE in Ultra Black
Follow Ups	98 j spec trans - Boostjuice 00:43:05 07/28/19 Maybe with some time it will get better? - Polish 01:06:56 07/28/19 Redline is not a good fit for new units. - Bernie (NoVA) 10:52:20 07/28/19 Bernie, concept z says the fluid in the trans should not - Boostjuice 12:02:27 07/28/19 Re: Bernie, concept z says the fluid in the trans should not - OleMissFan 17:23:13 07/28/19 Thanks (n/m) - Bernie (NoVA) 21:38:38 07/28/19 Because they are in the business of selling fluid? (n/m) - Bernie (NoVA) 21:38:09 07/28/19 remove the shipping fluid. Install the proper fluid - vorpalZed 23:35:25 07/28/19 hee haw! (n/m) - ForceFedTT 23:39:57 07/28/19 reasoning behind it? Just like to know why OEM - nonstopna 16:38:51 07/28/19 Re: Redline is not a good fit for new units. - Boostjuice 14:57:56 08/02/19 Because Nissan doesn't ship their transmissions filled w. it (n/m) - Bernie (NoVA) 02:15:53 08/03/19 I have had two of them in my Z - Drk93TT 07:41:48 07/28/19 Same story as Drk93TT here - kickerzx 15:28:26 07/28/19 Yep both mine are - Drk93TT 06:34:27 07/29/19 Why did you remove the Nissan fluid? (n/m) - Bernie (NoVA) 10:50:50 07/28/19 https://conceptzperformance.com/nissan-infiniti-nissan-oem-9 - Boostjuice 11:50:27 07/28/19 I don't buy it. - Bernie (NoVA) 21:32:17 07/28/19 The one I received from concept did not even have a - Boostjuice 22:30:17 07/28/19 Maybe they are draining them prior to shipping (n/m) - Bernie (NoVA) 10:59:24 07/29/19 Ironically, I was @ SZ's shop 5 days ago, asked Seb and Greg - ForceFedTT 23:18:58 07/28/19 Didn't even think about break in procedure for the trans(s) - Drk93TT 17:20:15 07/29/19 it wouldn’t have, Ive been taking it easy on it, and - Boostjuice 17:46:19 07/29/19 Re: it wouldn’t have, Ive been taking it easy on it, and - Metacom 19:33:28 07/29/19 Best fluid I have run in a Z32 is the Nissan stuff. - MixManMash 22:33:29 07/28/19 I had the same experience on mine, even my busted up - puchy 11:11:29 07/29/19 How do you know it's the input shaft bearing making noise? (n/m) - LitlElvis 12:02:55 07/28/19 Makes the same whine my 100,000 mile trans did - Boostjuice 12:30:29 07/28/19 Any chance it could be throwout bearing? (n/m) - CameronSF 17:35:09 07/28/19 Throw out bearing is new as well, it came on the trans - Boostjuice 18:19:49 07/28/19 If you really want to isolate it you can do this... - Ted (92TT) 19:05:03 07/28/19 i wouldn't worry about it. my 98 tacoma has done - slayer fan 01:20:44 07/29/19 the reason I ask is there are no less than 6 major bearings - LitlElvis 10:25:10 07/29/19 Throwout bearing makes noise when you push in the clutch - BlackholeZ 20:48:07 07/28/19 I run the recommended mix of long time members... - Oppaman Z 13:12:39 07/28/19 Re: 98 j spec trans - ryzan 06:23:41 07/29/19 I can't see that happening if the pilot bushing in the crank - MixManMash 07:24:19 07/29/19 I put the transmission in myself like I’ve done before - Boostjuice 08:46:11 07/29/19 Exactly. Therefore I'm not sure how it's possible to have a - MixManMash 12:47:03 07/29/19 just wanted to give everyone a heads up that the boxes still - Boostjuice 13:00:27 07/29/19 Re: just wanted to give everyone a heads up that the boxes still - RobZ32 15:39:28 07/29/19 I don't believe the issue is a bad batch. - Bernie (NoVA) 10:17:26 08/02/19 of course, Amateur Z has no experience with that scenario - vorpalZed 10:30:42 08/01/19 I wonder how much trouble it would be to replace just the - Polish 15:38:44 07/29/19 The bearing is not hard to get to, but I shouldn’t have to - Boostjuice 16:34:23 07/29/19 just search for my video on youtube. bet its the EXACT same (n/m) - Drk93TT 16:52:24 07/29/19 Here’s the video - Boostjuice 17:04:00 07/29/19 Exact same mhm - Drk93TT 20:59:33 07/29/19 Nissan will only warranty the parts if they diagnose it as - Bernie (NoVA) 21:08:11 07/29/19 I totally agree, though it does seem like there is a weird - Polish 17:08:00 07/29/19 I feel like Nissan maybe using cheap bearings - Boostjuice 17:16:36 07/29/19 Nissan uses high quality NSK bearings. It would be hard to - Bernie (NoVA) 10:21:18 08/02/19 I would take the whine over my 4th and 5th gear synchros - outkaZTT 22:03:44 07/29/19 My car sounds like it has a supercharger - Boostjuice 16:35:41 07/30/19 Spoke with Mike Smith @ JWT about his thoughts on this today - Bernie (NoVA) 22:13:43 07/31/19 Good info thanks for following up (n/m) - Polish 00:07:39 08/01/19 That's great insight. (n/m) - Zeus 09:18:56 08/01/19 I could see that. the next step from what I’ve been told - Boostjuice 11:15:26 08/01/19 Thanks, Bernie. (n/m) - ForceFedTT 10:07:24 08/04/19
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