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Old 04-17-2005, 09:14 AM
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Converter whine or whistle sound????

Hello everybody. Its been a few months since i've last visited (now the good weather is back).
I have a th-350 w/ a 2000 stall tci 10" converter hooked up to my sb400 -3.73 posi rear.
I've noticed that when i'm just driving around(slowly) I hear this faint whistle or whine.I'm not positive that it is the conv. but I am leaning towards that.For all I know it could be the carb. but, that makes more of a sucking through a straw sound--imo--! The car shifts great and what have ya...Fluid is good ...What I am getting at is , Has anybody heard of a converter whistle or something to that nature??? Glad to be back and happy cruising to all...!!!!!

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Old 04-17-2005, 10:59 AM
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converters can make noise...

do this ; check vacuum leaks, check the carb , and related hook ups.

do you have a proper PVC system hooked up on the engine?

A buddy thought his tranny was whistling , whine noise after the motor run for a minute and would whine for 2 - 5 seconds after engine shut down.

His engine had a PVC setup with NO inlet for the engine crank case. Vacuum would build up and the spot (where ever it was ) would suck air into the engine and whistle. He added a breather to the oppisite side vavle cover and NO whistle
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Old 04-17-2005, 11:06 AM
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Vacuum leak?
Carb air bleed?
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Old 04-17-2005, 12:06 PM
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Thanks for the replys. I have proper pvc setup w/air breather on opp. side.
There are no vac. leaks. As far as the carb. making the noise, I dunno.
It happens when I am driving slowly (not all the time) and it only happens for a second or two. You don't hear it when standing under the hood.Only when you are in the car and approaching rpms around 2000-2500 or so.I just tuned it up and after the race today , I am going for a test drive.I will check back later and double up on my notes. THX.

Ant.
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Old 04-18-2005, 06:57 PM
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Still puzzled. I will look further into this. It might be the carb. after all.
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Old 04-18-2005, 09:10 PM
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The reason I mentioned the air bleed was that I had a Holley that whistled at about 1200 rpm. It turned out the air bleeds were partially blocked.
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Old 04-19-2005, 05:19 AM
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Thanks MI2600. I will look into this ,as I also believe it might be the bleeds.
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Old 04-19-2005, 01:38 PM
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Is it only in 1st gear? If so it's most likley the front pump which won't hurt anything.
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Old 04-19-2005, 02:10 PM
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No. It happens in any gear but at a certain rpms-(1500-2500)..
you just apply little gas and you'll hear it ,---then its gone
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