th400 problems...have question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

67cst · 07-18-2004, 03:25 PM

last night i was going up the highway and all the sudden i hear this loud whining noise, i pulled over right away and as soon as i stop moving it goes away, i checked all the fluid levels in the truck and they were fine, when i pulled back onto the highway the noise was gone, then again on the way home it did it again, i is pretty loud, this time i put it in neutral and after a couple of seconds it was gone, put it back in gear and drove straight home, so it did it 2 times...what could this be? do i need a new torque converter possibly? i dont know much about these transmissions, im still learning all this fun stuff, could someone help me figure out this problem? thanks in advance

DEREK

7gmc2 · 07-18-2004, 03:51 PM

possibly a stopped up screen? when is the last time you did a fluid and filter change on it? if the screen is stopped up it will make a loud whinning ( where is the spell check when i need it?) noise. i would think about that first.

67cst · 07-18-2004, 04:12 PM

7gmc2...i was thinking thats the first thing id do anyways, will the tranny be harmed if i drive it right now?

7gmc2 · 07-18-2004, 04:28 PM

i wouldn't drive it at all unless i could help it. i burned up a turbo 400 once before like that. if you have to do as you did before and drive it and stop it as soon as it starts. limp it to the nearest transmission shop, or change it yourself if you are able to.

67cst · 07-18-2004, 04:40 PM

yes i am able to do the filter and fluid, you figure thats all it is? what is making the noise that i hear? and why is it happening? because the filter is clogged it isnt getting any fluid?

7gmc2 · 07-18-2004, 05:06 PM

if the filter is clogged or getting cloged it is limiting the fluid to the pump. the squeal is the pump with little to no fluid! the pump will go and then the torque convertor will get burned up and then that is that!

67cst · 07-18-2004, 05:49 PM

thanks 7gmc2, ill get the ramps at work tomorrow so i can get under the damn truck and drop the pan and get that filter out, it sure would be nice to have a plug in that pan..
oh--do you or anyone else know anything about those tranny pans that have tubes going though them lengthways and air travels though and cools the fluid, a friend has one and he said i could have it but should i even bother, its just a weekend cruiser nothing fancy..

7gmc2 · 07-18-2004, 07:57 PM

totally up to you on that one.....i have never used one myself. i think for what use you give it the stock pan is fine. that is all i have on mine now. hope it solves your problem for you! good luck.

07-18-2004, 03:25 PM	#1
67cst i love summertime Join Date: Jul 2002 Location: Kelowna BC Posts: 4,302	th400 problems...have question last night i was going up the highway and all the sudden i hear this loud whining noise, i pulled over right away and as soon as i stop moving it goes away, i checked all the fluid levels in the truck and they were fine, when i pulled back onto the highway the noise was gone, then again on the way home it did it again, i is pretty loud, this time i put it in neutral and after a couple of seconds it was gone, put it back in gear and drove straight home, so it did it 2 times...what could this be? do i need a new torque converter possibly? i dont know much about these transmissions, im still learning all this fun stuff, could someone help me figure out this problem? thanks in advance DEREK __________________ 1967 shortbox stepside Chevy, 365 hp 327, th400. GLOVE BOX LIGHTS FORSALE, click link for info http://67-72chevytrucks.com/vboard/s...d.php?t=273724

07-18-2004, 04:12 PM	#3
67cst i love summertime Join Date: Jul 2002 Location: Kelowna BC Posts: 4,302	7gmc2...i was thinking thats the first thing id do anyways, will the tranny be harmed if i drive it right now? __________________ 1967 shortbox stepside Chevy, 365 hp 327, th400. GLOVE BOX LIGHTS FORSALE, click link for info http://67-72chevytrucks.com/vboard/s...d.php?t=273724

07-18-2004, 04:40 PM	#5
67cst i love summertime Join Date: Jul 2002 Location: Kelowna BC Posts: 4,302	yes i am able to do the filter and fluid, you figure thats all it is? what is making the noise that i hear? and why is it happening? because the filter is clogged it isnt getting any fluid? __________________ 1967 shortbox stepside Chevy, 365 hp 327, th400. GLOVE BOX LIGHTS FORSALE, click link for info http://67-72chevytrucks.com/vboard/s...d.php?t=273724

07-18-2004, 05:49 PM	#7
67cst i love summertime Join Date: Jul 2002 Location: Kelowna BC Posts: 4,302	thanks 7gmc2, ill get the ramps at work tomorrow so i can get under the damn truck and drop the pan and get that filter out, it sure would be nice to have a plug in that pan.. oh--do you or anyone else know anything about those tranny pans that have tubes going though them lengthways and air travels though and cools the fluid, a friend has one and he said i could have it but should i even bother, its just a weekend cruiser nothing fancy.. __________________ 1967 shortbox stepside Chevy, 365 hp 327, th400. GLOVE BOX LIGHTS FORSALE, click link for info http://67-72chevytrucks.com/vboard/s...d.php?t=273724

07-18-2004, 03:51 PM	#2
7gmc2 Registered User Join Date: Jun 2004 Location: Rockville Va. Posts: 260	possibly a stopped up screen? when is the last time you did a fluid and filter change on it? if the screen is stopped up it will make a loud whinning ( where is the spell check when i need it?) noise. i would think about that first.

07-18-2004, 04:28 PM	#4
7gmc2 Registered User Join Date: Jun 2004 Location: Rockville Va. Posts: 260	i wouldn't drive it at all unless i could help it. i burned up a turbo 400 once before like that. if you have to do as you did before and drive it and stop it as soon as it starts. limp it to the nearest transmission shop, or change it yourself if you are able to.

07-18-2004, 05:06 PM	#6
7gmc2 Registered User Join Date: Jun 2004 Location: Rockville Va. Posts: 260	if the filter is clogged or getting cloged it is limiting the fluid to the pump. the squeal is the pump with little to no fluid! the pump will go and then the torque convertor will get burned up and then that is that!

07-18-2004, 07:57 PM	#8
7gmc2 Registered User Join Date: Jun 2004 Location: Rockville Va. Posts: 260	totally up to you on that one.....i have never used one myself. i think for what use you give it the stock pan is fine. that is all i have on mine now. hope it solves your problem for you! good luck.



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