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HAPPY NEW YEAR
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Discussion Starter · #1 ·
Put a new 350 tbi in the truck recently. On startup there is a very very loud ticking and as the truck warms up it ceases. You can still hear it at idle and when the brakes are applied it will get slightly louder. At first thought the flywheel bolts were loose but they seemed very tight today when I checked (took off the dust cover) so my next guess would be transfer case? What are the symptoms of bad transfer case?
 

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Boss
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Low oil perhaps? Heard a small tick the other day when I started mine up because it was low on oil
 

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HAPPY NEW YEAR
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Discussion Starter · #10 ·
This isn't a knock I mean its LOUD really sounds like the flywheels hitting something as it rotates. Its coming from the bottom end of the truck like the flywheel/transfer case area...Maybe a video would help? It didn't do this for the first couple days the engine was in, it has gotten louder over time like something is going out or has become loose.
 

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HAPPY NEW YEAR
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Discussion Starter · #12 ·
no it seems to go away...but then when I slow down it comes back and when the brake is applied it comes back. I've had several friends who know a decent bit about mechanics take a look and noone has said anything about the engine. This engine was freshly rebuilt too, runs great.
 

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HAPPY NEW YEAR
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Discussion Starter · #13 ·
Okay guys quick q, the flywheel bolts directly to the transfer case correct? I just got under there since I have the dust cover for the flywheel and transfer case off. Got my dad to start it (cold) and just listened. There is no noise coming from the bottom/top end of the engine. Its all coming from what the flywheel is directly bolted to (which im guessing is the transfer case?) It start out very loud and quiets down a little bit once the engine gets warm but 100% of the noise is coming from that piece...? Thoughts? Do transfer cases "knock or tick" loud when they are going out? Also I grab the flywheel and transfer case and their is maybe 1/4 " of play...thoughts?
 

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Allison Specialist!
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do you mean the torque converter bolts?(assuming its an auto) thats what i thought bolts to the flywheel...should be 3 of them that are 15mm if i remember right...if not sounds like something might be loose like the exhaust....
 

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HAPPY NEW YEAR
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Discussion Starter · #15 ·
Its definitely no exhaust issue. The noise sounds like it is coming directly from the torque converter and flywheel. I got a wrench up in there and checked all the bolts as I rotated the flywheel and none of them seemed to be loose??? Any other thoughts on this. Also is driving around without the dust cover on a huge deal? I don't daily drive it or anything but I was wondering if I should just stop any small trips all together?
 

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Allison Specialist!
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675 Posts
you can drive it with it off just remember its more like to get dirty in places that normally dont....How do the teeth on the flywheel look? Did you pull the converter out for any reason?
 

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HAPPY NEW YEAR
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Discussion Starter · #17 ·
All the flywheel teeth are fine and I didn't touch the converter. I'm thinking about bringing into Coleman Taylor Transmissions and getting a free quote, this way ill know exactly what it is and then either decide to pay up or do it myself.
 

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Allison Specialist!
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675 Posts
mystery noises always suck..Prob end up being something simple, whatever the case good luck with it! Maybe someone else might chime in with some good ideas too what it might be....
 
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