Squealing Noise after 3.4 swap new everything
#1
Registered User
Thread Starter
Squealing Noise after 3.4 swap new everything
So I have about 50 miles on my 3.4 swap. This morning after going for a short 5 mile drive I pulled into the driveway and heard this squeak/squealing noise develop. I had to get to work so I shut it down and headed out. Tonight after work I started up the truck and there was no noise, everything seemed fine, so I went for a 10 mile drive, took it on the freeway, around town and whatnot. No noise. Pull into the driveway again, and the squeak/squeal starts up again.
What do you guys think? Any opinions would be appreciated, not too excited at the idea of pulling the trans again.
Here is a video of the noise:
- New clutch
- new throw out bearing
- new pilot bearing
- rebuilt trans
- rebuilt engine
- lubed up the bearing and related surfaces during assembly
- Changes pitch slightly when I depress the clutch
- sometimes fades away with clutch partially engaged, not consistent
- revving up the engine makes it go away until it settles at idle for a few seconds
- using a stethescope, the noise was clearly pinpointed in the bellhousing
- putting trans in gear does not change anything while stopped except for the similar pitch change when using the clutch
What do you guys think? Any opinions would be appreciated, not too excited at the idea of pulling the trans again.
Here is a video of the noise:
#4
Registered User
Thread Starter
It was squealing pretty good today until I went out and took it on a good 30 mile drive to try and get my catalyst monitor set to ready, which thankfully happened. Since that drive it hasnt made any noise, so I will just keep my fingers crossed for now and report back if anything develops.
Thanks for the input guys.
#5
You know what, I just had a thought. Who did the crossover pipe? I've seen it before where exhaust can make squealing noises. That's another thing to check is the crossover to make sure its not rubbing on any heat shields like the one right over the firewall on the driver side.
#6
Registered User
Thread Starter
You know what, I just had a thought. Who did the crossover pipe? I've seen it before where exhaust can make squealing noises. That's another thing to check is the crossover to make sure its not rubbing on any heat shields like the one right over the firewall on the driver side.
Good idea vital, I will double check the clearances on everything back there. I made the crossover myself from all new pipe since my engine had the newer style hydro formed double walled hunk of metal, not the older stye you could just cut up and flip around. It fits pretty good, but definitely worth checking out again. Thanks for the idea. Ill report back.
A little update about the noise itself, its very intermittent, varies in loudness and definitely changes pitch with RPM. I am going on a little trip this weekend with the truck to get some miles on it, so I am going to monitor the noise and if it persists I will try to take another video of it. I know I am going to have to pull the trans again if it does.. but still holding out a little bit of hope that it wont come to that
Here is a shot of the crossover getting installed:
#7
Registered User
I've heard such noises after a new clutch job in one of my big trucks but a shot of grease to the throwout bearing usually does the trick. You don't have that option though. May just be a little piece of debris that stuck in there when you installed it. I wouldn't worry too much yet. If it were one of my work trucks, I'd send it out for a full day's work before I tore anything down. However, if it were one of my Runners, I'd just hang my head and worry about it for a week. It's going to be ok though. Hope it just goes away.