How can I prevent this TOB noise... - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 05-27-2010, 01:56 PM   #21
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Did you grease the portion of the shaft that went into the pilot bearing? Kinda have to be careful though, too much grease could actually press it out.
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Old 05-27-2010, 01:59 PM   #22
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Ah. From your video it seemed like it went away once the clutch was all the way in. If it goes away when you partially press the pedal, then your theory makes sense.
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Old 05-27-2010, 02:09 PM   #23
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yeah, if i give it just a just enough to move the fork, the noise subsides.
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Old 05-27-2010, 02:12 PM   #24
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Mine started once i put the HD clutch in...and im pretty sure your right Brian it is the TOB.
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Old 05-27-2010, 02:18 PM   #25
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Mine made EXACTLY that same sound, until I blew it up 15,000 miles later. I removed/replaced the clutch multiple times and am convinced it was the transmission. It started after I either put in my ACT XT, or swapped the differential, can't remember.
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Old 05-27-2010, 02:43 PM   #26
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I have also ALWAYS had this noise with every car I own, some worse than others. Thankfully my Miata is fairly quiet compared to most of them. I always install correctly, using new parts, after cleaning all surfaces and applying grease, and yet I always end up with some kind of un-factory sounding TOB roar.
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Old 05-27-2010, 02:59 PM   #27
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This isn't craigslist. Try not to post your personal ads here
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Old 05-27-2010, 03:10 PM   #28
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Ive always just used a ton of grease on the forkends and the throwout bearing to ensure zero noise/longevity and a little grease in the pilot bearing in the flywheel.
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Old 05-27-2010, 03:29 PM   #29
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I'm glad my car no longer makes that sound.

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Old 05-27-2010, 03:37 PM   #30
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are you speaking of the drivetrain whining? that's exactly what mine sounds like now.
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Old 05-27-2010, 03:39 PM   #31
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Quote:
Originally Posted by Braineack View Post
are you speaking of the drivetrain whining? that's exactly what mine sounds like now.
Aye.
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Old 05-27-2010, 03:40 PM   #32
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Mine also sounds like that. I blame my light flywheel and ready to grenade trans that was run without oil.
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Old 05-27-2010, 03:41 PM   #33
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I switched transmissions, while keeping the lightweight flywheel, and the sound went away.
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Old 05-27-2010, 03:44 PM   #34
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Guess it's my trans then. Not surprised.
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Old 05-27-2010, 03:52 PM   #35
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you can hear it good here:




and then my bird chirping brake pads.


Mine got really bad when my diff ran without oil, im assuming the extra load trying to drive a bad diff wore out the bearings in the trans.
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Old 06-06-2010, 02:43 AM   #36
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Update:

Swapped the clutch and tranny. Lube all the point indicated below, it's silent. I'm pretty sure the noise was the TOB rattling on the fork.
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Old 06-06-2010, 03:16 AM   #37
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Quote:
Originally Posted by Braineack View Post
Update:

Swapped the clutch and tranny. Lube all the point indicated below, it's silent. I'm pretty sure the noise was the TOB rattling on the fork.
Any idea what cured it? I always assumed mine was related to rattles from the TOB on the fork, but never knew what could really be done about it. Always use new parts, and grease. Always have the noise anyway.
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Old 06-06-2010, 01:42 PM   #38
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when I pulled the trans I took a look and the TOB; still looked in good shape and spun smooth. However, when sitting there on the input shaft there was a good .125-.250" of play on the fork. I'm pretty sure that particular noise was the TOB rattling on the fork since there was zero grease on the fingers of the fork or the slots on the TOB. It made a similar noise when I would jiggle it around.

When I put the new bearing on the fork after greasing both heavily, there was less apparently play and it made no noise since it was dampened by goo.

All my other noise are gone now too with this new trans so my drivetrain is finally quiet.
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