Starfighterpilot Posted July 22, 2011 Report Share Posted July 22, 2011 Just what the title asks - What are the symptoms of the torque tube bearing starting to bite the dust. Thanks in advance. KEN Link to comment Share on other sites More sharing options...
Ironside Posted July 25, 2011 Report Share Posted July 25, 2011 Bump I would like to know myself. Link to comment Share on other sites More sharing options...
NotStock88 Posted July 25, 2011 Report Share Posted July 25, 2011 subscribed. Link to comment Share on other sites More sharing options...
Caliber308 Posted July 26, 2011 Report Share Posted July 26, 2011 (edited) Just what the title asks - What are the symptoms of the torque tube bearing starting to bite the dust. Thanks in advance. KEN NOISE!!! Ken, have you checked out the Torque Tube upper and lower cushion mounts? Bill Edited July 26, 2011 by Caliber308 Link to comment Share on other sites More sharing options...
Edde Posted July 26, 2011 Report Share Posted July 26, 2011 Yeah I'd have to say that it's a bearing. You'd diagnose it like most any similar bearing, up close and personal. Too much overall movement (play), and an un-smooth feel rotating, burnt or badly worn needles, etc. Oh, yes. And noise. There are so many potential "slop" points along the drivetrain... Link to comment Share on other sites More sharing options...
Edde Posted July 26, 2011 Report Share Posted July 26, 2011 Yeah I'd have to say that it's a bearing. You'd diagnose it like most any similar bearing, up close and personal. Too much overall movement (play), and an un-smooth feel rotating, burnt or badly worn needles, etc. Oh, yes. And noise. There are so many potential "slop" points along the drivetrain... Link to comment Share on other sites More sharing options...
mstieg Posted July 26, 2011 Report Share Posted July 26, 2011 Are the TT bearings and shafts available? Seems most all of them have bled dry long ago, teeth get mashed, and I know new ones are gone. Link to comment Share on other sites More sharing options...
Starfighterpilot Posted July 27, 2011 Author Report Share Posted July 27, 2011 (edited) The reason I initially asked this question is the Old Broad started to gradually develop a drive train vibration that increased with boost/RPM whenever I took boost up past 3 LB and 2200 RPM accelerating. No vibration on decceleration or just cruising along. I also was gradually developing a exhaust leak with turbo shrieking (ie somewhere in the exhaust manifold/turbo assembly something was coming loose). Friday all the fasteners appeared to be there but I didn't check 'em for tightness - it was too damn hot outside. I put on about 100 miles this week end. I ordered new exhaust manifold copper nuts from Dad Friday. I had the tranny rebuilt & a new pilot bearing and throwout bearing installed back in 12/09, replaced both CV joints in 4/10 and replaced both u-joints correctly in 10/10. So I eliminated those possiblities which left either I had an exhaust system induced vibration or the torque tube bearing was giving up the ghost (torque tube has never been touched - but that will happen). Monday I noticed that the forward most No 1 cylinder exhaust manifold to head mounting nut had decided to leave the car. Yesterday I replaced the nut with a M8x1.25 run of the mill nut and tightened it and checked if it's #1 exhaust runner sister was tight (had to remove the PITA heat shield to do it). The sister nut was tight & I reinstalled the heat shield. I checked all of the other exhaust fasterenes for tightnes and they were tight. This was the only thing that I did to her. I took the Old Broad out for a test drive and the shrieking went away. . But what REALLY blew me away was so did the drive train vibration. :blink My exhaust manifold is stressed relieved (webs between the exhaust ports are cut) & surfaced. So the only thing I can figure out is that the No 1 exhaust runner was vibrating and transmitting that vibration to the drive train. Damn I find this hard to believe with one of the #1 exhaust runner nuts tight, but that's, NO BS, what happened. Anyone else experience this off the wall vibration situation? Randy's exhaust nuts should be here today and I'll replace the funky one. For What It's Worth. KEN Edit - I'm running the Felpro exhaust manifold gasket. Edited July 27, 2011 by Starfighterpilot Link to comment Share on other sites More sharing options...
mstieg Posted July 27, 2011 Report Share Posted July 27, 2011 I did also, but it was at it's worst around 50-60 mph. Despite having the driveshaft rebalanced with new U-joints, after the prob. continued, I tossed in another TT to no avail. The problem turned out to be the driveshaft! Stoopit first shop I assume this is a rotational vibration that directly varies with speed? if it varies with rpm/boost instead, that'd be related to your manifold stud, and leakage. But that is usually just noisy & loss of power, not a vibration Link to comment Share on other sites More sharing options...
Indiana Posted July 27, 2011 Report Share Posted July 27, 2011 Got a driveshaft shop you can take it to and have it checked for balance and to see if one of the forks is bent? I've replace the TT bearing before its easy they make a sound sort of like a bad wheel bearing its hard to tell where the noise comes from unless you are under the car. The spline coupling you know could use cleaned and relubed. When a joint binds up that stress will transfer through that TT front bearing and try to cause the shaft to vibrate and it could be that bearing is worn out based on how many miles your car has. Link to comment Share on other sites More sharing options...
UlrichWolf88 Posted July 28, 2011 Report Share Posted July 28, 2011 I have torque tube bearings in stock, every day. As for hard parts, they are all NLA, except there WAS one complete torque tube left in the country last I checked. Likely gone by now. Tim Link to comment Share on other sites More sharing options...
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