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I think I broke it already

Sounds like we need to quit talking and start investigating. If it isn't in the driveshaft (universals) or the rear then yank the tranny and get to work. My bet is it's a bearing.
 
What lube is in there?
Maybe drain it and see what you find in it?
 
moparedtn said:
This is very plausible. The bushing is/was new, but the tranny fought like the dickens to go that last little bit into it when assembling everything.
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moparnation74 said:
The pilot bushing noise would be evident when the clutch is depressed.......
With the noise being constant above a certain speed I lean towards a bearing......
Click to expand...
I can follow that logic, yes.
I wonder about the tailshaft bushing we put in last fall. I know they're all the same size and I know we lined up the oiling hole in it nicely.
I also know without the special tool, it would have been a bear to get out and install, since it's a definite press fit.
No way that thing came loose?
 
lewtot184 said:
pull the inspection cover off the bellhousing and look for clutch disc problems. 23 spline clutch discs aren't always well made.
Click to expand...
This one is a high-dollar CenterForce Dual Friction setup. New flywheel, factory 11" cast iron bellhousing, the works, all new.
After the racket started, I could discern no difference in the actual operation of the car at all.
Hoping that's a good sign.
 
65-440 said:
sounds like its time to put the rear on jack stands and have someone run it up to speed while you listen
Click to expand...
Yeah, that's next, risky as it is. Downright scary, in fact.
I'll go ahead and drop the speedo cable and go down the street one time in a hail mary attempt, but you know how that's
likely to turn out.
After that, I'll have my friend get in it while it's up on stands and I'll get under there.
Yikes....and yeah, y'all know me. There will be video of the carnage. :)
 
UPDATE 2/23/18 6pm EST:
Got the car up on four (yes, 4) jackstands under the rear axle and tried to duplicate the sound.
Nada. No matter what I tried, what gear the tranny was in (or out of), clutch in or out, didn't matter.
No racket. Heck, I was encouraged even.
Friend was with me to verify from outside the car with me inside.
Buzzed it up to 70mph (!). That was nuts.
Fluid level verified. Even pumped more in until it was rolling out the fill hole.
Type:
IMG_20180223_174210370.jpg

(What Brewer's recommends. Bought it from them, in fact)
Garage test: FAIL - could not even start to reproduce the sound. Of course, she wasn't hot yet, but the car was allowed to warm up before attempting this crazy shiyat.

Ok, down off the stands it came and out for a ride we went. Two miles down the two lane to the 4 lane, driveline warming up along the way I suppose.
We hit the four lane and the racket RETURNED, just as it had before - anything over 45mph and here it went.
Clutch in or out, in gear or out of gear, 3rd gear, 4th gear, didn't matter - it is speed determined only.
Friend was all over the floorboard, trying to pinpoint it and determine what it was, me trying everything to affect it to no avail.
Must have looked funny to people we passed on the way. :)

I took out my phone and took this short video. To explain what you're seeing, I took the phone and literally stuck it through the radio hole in the dash (since I don't have a working radio STILL) to capture the sound towards the bellhousing end, then backed the camera out of the hole and held it down by the shifter boot. You can hear the noise plain as day here:



I reckon whatever it is sounds louder towards the rear/output end of the transmission. See how I said it sounds like a speedo cable sort of?
Unless you all recognize it right away, I guess I'm looking at replacing the mystery tranny at this point. :(
Guys, that is a deal killer. Can't afford that.
 
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Sounds normal to me. Seriously it does, but I know where ur coming from. Bearing at frt of trans or rear of case is my guess, not the bushing in tailshaft.
 
P.S. Almost forgot - with only a few hundred miles on the setup, the gear lube looks brand new in there.
 
oldbee said:
Sounds normal to me. Seriously it does, but I know where ur coming from. Bearing at frt of trans or rear of case is my guess, not the bushing in tailshaft.
Click to expand...
No sir. Nowhere near normal. Sudden new noise, like a gigantic pissed off hornet under the hump, happened after an enthusiastic clutch dump into 2nd yesterday. The noise/buzz is accompanied by a slight, discernable vibration.
Listen closely at the end of the video - it's loudest behind the stick and you can hear almost a reciprocal-ness to it, like a pump of sorts.
 
Can’t really see with the flash- 85w90? Maybe try 85w140? Cheapest 1st try, but you already had it out on the road. This crap just wants to make you give up,BUT you still got the rest of your life. Think kinda positive. Jeff
 
Jeez that is odd, definitely sounds like it’s from the bellhousing area. Time to drop the trans, get to work
 
Geeez, sure sounds like ya' got a beehive in there. Reminds me of worn/dry bearings.
 
oldbee said:
Can’t really see with the flash- 85w90? Maybe try 85w140? Cheapest 1st try, but you already had it out on the road. This crap just wants to make you give up,BUT you still got the rest of your life. Think kinda positive. Jeff
Click to expand...
85W90.
Yeah, about that "rest of my life" stuff.... :screwy:
 
1967coronet440 said:
Jeez that is odd, definitely sounds like it’s from the bellhousing area. Time to drop the trans, get to work
Click to expand...
Nope, got louder the farther back I pulled the phone, loudest at the end of the video close to the hump behind the shifter. Definite mechanical sound to it there, well defined. If you think about it, makes no sense to come from the front of the tranny, since gear/engine speed/clutch in or out have no effect.
 
moparedtn said:
Nope, got louder the farther back I pulled the phone, loudest at the end of the video close to the hump behind the shifter. Definite mechanical sound to it there, well defined. If you think about it, makes no sense to come from the front of the tranny, since gear/engine speed/clutch in or out have no effect.
Click to expand...
Hard to tell from a phone video, either way time to drop it.
 
Daves69 said:
Geeez, sure sounds like ya' got a beehive in there. Reminds me of worn/dry bearings.
Click to expand...
Yep, I want to say tailshaft bearing. Sort of makes sense that the tailshaft bushing was pretty much gone, probably from play caused by the bearing.
 
You didn't mention if you took the speedo cable off. That is a low pitched buzz. I don't think it is a bearing . Kinda sounds like something rubbing on teeth of maybe a gear or the flywheel. You might try taking off the shifter boot and then maybe figger out which area the sound is coming from. Puzzles me that the tranny needs warmed up before the sound comes in. You might try inspecting the speedo drive before taking the tranny out. Sounds like possibly the plastic teeth to spiral gear interference.
With it warmed up to the point it makes the noise, you might try , tires off the ground , tranny in neutral, turn the driveshaft with your hands and see if you can feel any roughness in the driveshaft. .......................MO
 
I expect you have checked for yoke play in the tail of tranny, and the rear U-joint&yoke? Those things will make a buzzing-vibrating sound . Of course you have checked U joints being in phase?? Don't pull that tranny till you have exhausted all other possibilities. Pull the clutch cover off the bottom of bellhouse and check , noise can transmit to other places.................................MO
 
Cornpatch MO said:
You didn't mention if you took the speedo cable off. That is a low pitched buzz. I don't think it is a bearing . Kinda sounds like something rubbing on teeth of maybe a gear or the flywheel. You might try taking off the shifter boot and then maybe figger out which area the sound is coming from. Puzzles me that the tranny needs warmed up before the sound comes in. You might try inspecting the speedo drive before taking the tranny out. Sounds like possibly the plastic teeth to spiral gear interference.
With it warmed up to the point it makes the noise, you might try , tires off the ground , tranny in neutral, turn the driveshaft with your hands and see if you can feel any roughness in the driveshaft. .......................MO
Click to expand...
Cornpatch MO said:
I expect you have checked for yoke play in the tail of tranny, and the rear U-joint&yoke? Those things will make a buzzing-vibrating sound . Of course you have checked U joints being in phase?? Don't pull that tranny till you have exhausted all other possibilities. Pull the clutch cover off the bottom of bellhouse and check , noise can transmit to other places.................................MO
Click to expand...
Thanks, Mo. Yes, it does have a definite "geared" sound to it. No, I haven't gone to the speedo drive yet - I figured if it was something like that, it surely would have chewed the plastic off the speedo gear pretty quickly? It sure is persistent and predictable - and sort of heavy for plastic? I dunno.
As far as your other suggestions, all that jazz was checked before, checked today. Total waste of time in this particular case. Why? Once again - this is a SUDDEN occurrence and all of those are gradual wear items.
 
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