bad u-joints? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ocbaud · 12-21-2002, 01:57 AM

okay, this has seemed to be getting worse. i'm having a loud rattling coming from under my truck whenever i accelerate from a dead stop. it sounds sorta like pop cans dragging along with my truck, but it will stop if i let off the gas, which to me would indicate a bad ujoint, but.... it will also stop after i get to some random speed going.

what could this be? its really bothering me and i need to find out so jon and i can fix it next weekend when we lower my truck

79BIG10 · 12-21-2002, 10:57 AM

Hate to think it but maybe the Torque Converter? What makes me think this is that it's doing it at accerating where the engine is spinning it more under load. Also what about maybe the rear axle? But you may be right with the U-joints. Easy to replace. I would change them out and see how it does. One more thing is to check under the truck for your T/C cover may be loose as well.

ocbaud · 12-22-2002, 12:45 PM

the torque converter was replaced with a remanufactured one back in january when i had the tranny rebuilt, along with new u-joints from the front to back and new drive shaft

bigblock73 · 12-22-2002, 04:28 PM

sounds like u-joints to me. Even if it isn't, they are cheap and easy to do and it will give you peace of mind and one less thing to troubleshoot.

-Jeff

ocbaud · 12-22-2002, 05:27 PM

Quote:

Originally posted by Riptide's 78p/u
check the simple stuff first, I would bet from your description it is the torque converter cover that is rattling

is it the black cover that is between the oil and transmission pans?

if so, i checked it and its tight.

ocbaud · 12-22-2002, 06:06 PM

Quote:

Originally posted by Riptide's 78p/u
yep, just another thought, check the torque converter to flexplate bolts, and I do hat to say this but when you had the tranny out did you replace the flexplate? cause when they crack they sound like what you are describing.

i umm.... shifted it into reverse going about 20 mph and dropped the driveshaft, and had to have the thing towed and they rebuilt it

86SILVERADO · 12-22-2002, 07:27 PM

My three year old son almost kicked mine into reverse doing 55 on the highway. He also kicked the fuel tank switch once and instead of going to the other tank it stuck in the middle and killed my truck instantly. This was during one of the worst snowstorms of the winter luckily I made it to the side of the road, but it took me a good 20 minutes to figure out what happened.Keep the kids in the middle my a**.

12-21-2002, 01:57 AM	#1
ocbaud Garage Queen Material Join Date: Oct 2002 Location: USA Posts: 4,129	bad u-joints? okay, this has seemed to be getting worse. i'm having a loud rattling coming from under my truck whenever i accelerate from a dead stop. it sounds sorta like pop cans dragging along with my truck, but it will stop if i let off the gas, which to me would indicate a bad ujoint, but.... it will also stop after i get to some random speed going. what could this be? its really bothering me and i need to find out so jon and i can fix it next weekend when we lower my truck

12-21-2002, 10:57 AM	#2
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	Hate to think it but maybe the Torque Converter? What makes me think this is that it's doing it at accerating where the engine is spinning it more under load. Also what about maybe the rear axle? But you may be right with the U-joints. Easy to replace. I would change them out and see how it does. One more thing is to check under the truck for your T/C cover may be loose as well. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

12-22-2002, 07:27 PM	#7
86SILVERADO Registered User Join Date: Dec 2002 Location: Hills of Western Mass Posts: 626	My three year old son almost kicked mine into reverse doing 55 on the highway. He also kicked the fuel tank switch once and instead of going to the other tank it stuck in the middle and killed my truck instantly. This was during one of the worst snowstorms of the winter luckily I made it to the side of the road, but it took me a good 20 minutes to figure out what happened.Keep the kids in the middle my a. __________________ 86 Silverado C10 back to 305 power! 67 C30 Dually Dump, with 350 transplant, Rockhauler 05 Duramax 3500 "If at first you don't succeed, try a bigger hammer" Member of the 1-Ton club!**

12-22-2002, 12:45 PM	#3
ocbaud Garage Queen Material Join Date: Oct 2002 Location: USA Posts: 4,129	the torque converter was replaced with a remanufactured one back in january when i had the tranny rebuilt, along with new u-joints from the front to back and new drive shaft

12-22-2002, 04:28 PM	#4
bigblock73 yeller Join Date: Oct 2001 Location: Twin Cities Posts: 13,824	sounds like u-joints to me. Even if it isn't, they are cheap and easy to do and it will give you peace of mind and one less thing to troubleshoot. -Jeff



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.