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69mychevy · 07-04-2002, 08:19 PM

hey everybody june 30th i posted a question that looked sumthin like this: my 69 chevy sometimes will vibrate at 445 or 50 and sometimes not until 65, how do i fix it, is it u-joints?? driveshaft?? i hav to go on the highway with this truck and i can't when its vibrating, and its not at high rpms when its vibrationg only like 2000

i got a lot of answers but i don't think many of them are right because it is in such a range of speeds and rpm's so it couldn't b u-joints or driveshafts could it? if it is tell me, if not tell me what u think it is

hanssolo · 07-04-2002, 08:37 PM

Did you ever drop the shaft and check the U-joints?

JHickson6 · 07-04-2002, 08:46 PM

May have been said already but have you checked your carrier bearing? Notorious for causing bad vibrations and can kick in at any time?

Check it out!

JHickson6

69mychevy · 07-04-2002, 08:49 PM

ok im new at this first of all whats a carrier bearing and second of all how do u drop a drive shaft and what do u look for if a ujoints busted?

JHickson6 · 07-04-2002, 09:34 PM

The carrier bearing is the bearing in the middle of you 2 piece driveshaft. This is what a new one looks like. As for taking apart the driveshaft, go out and buy a Chilton Manual or Hanyes Manual for your truck, it explains it all.

JHickson6

JHickson6 · 07-04-2002, 09:40 PM

forgot to post pic

69mychevy · 07-04-2002, 09:44 PM

hey 3 things
1 i don't see a two piece driveshaft im prolly retarded but both driveshafts look the same just different lengths
2 i don't see that little carrier bearing anywhere
3 where do i get a chiltons or haynes book, anywhere off the internet?

dion · 07-04-2002, 11:56 PM

Did you check the front end? The carrier bearing is a U shaped piece of metal in the middle of the two shafts bolted to the frame with rubber in it that the shaft goes through, mine is bad too but it dosen't make my truck vibrate. I doesn't sound like the U joints to me.

JHickson6 · 07-05-2002, 07:38 AM

I would try find a way to take a picture of the Undercarriage and driveshaft with the help of some one who has a digital camera or take a regular photo and then scan it. Then we can see what you have! Those manals are available on the internet, at bookstores, local auto parts stores!

Good Luck

JHickson6

johnnyp · 07-05-2002, 08:37 AM

Do you have auto tranny? If so, take a look at this - could be worth a shot ----

Torque Converter shudder is usually not the first guess that mechanics and non-mechanics will make when this symptom first surfaces.

Complaint:

What you usually experience is a slight shake or vibration in third or fourth gear that is downright annoying. It has a certain "washboard road" feel in the seat of your pants. Drivers usually just live with this problem until they can't stand it anymore.

Cause:

Torque converter shudder is very simply caused by worn-out transmission fluid. The lock-up clutch inside the torque converter is slipping/grabbing giving the shudder effect.

The fluid is originally died pink at the factory so you can tell when the fluid is failing or oxidizing. It will turn dark red, then change to brown, and finally to black. Automatic transmissions are designed to slip as part of their normal operation. Poor quality fluid allows too much slip and eventually causes failure. In severe-duty vehicles like Police, Limo, Taxi, the fluid quality is much more crucial.

Solution:

Use an Automatic Transmission Fluid Exchanger/Flusher to completely remove the old fluid every 20,000 miles (severe-duty). This process ensures that the fluid is reset to 100% performance efficiency. The torque converter lock-up clutch will no longer chatter. We have seen this happen hundreds of times in our on-site maintenance operation. If your fleet is within 400 miles of Detroit, MI, contact us regarding on-site maintenance.

Paul Clark · 07-05-2002, 08:47 AM

Something cheap to try -
Check the air pressure in your tires. Then, rotate them. Can't hurt. Might help.

**JIMs70GMC** · 07-05-2002, 11:23 AM

Could be a radial tire problem or out of balance tires. For the radial problem swap tires side to side. If both tires are out of balance they could be compounding then cancelling the vibration you drive. You will feel an u-joint during acceleration. If this is on a 4wd is your front drive shaft spinning?

Fill in your profile, there could be someone close to you to lend a hand.

69mychevy · 07-05-2002, 11:25 AM

Paul Clark, thanx for the tip im gonna try that
Johnnyp i don't hav an auto tranny any other ideas?
Dion, i don't think i hav a two piece driveshaft with a carrier bearing so for u and jhickson i'll try to post the undercarriage.
Dion how do u check the front end??

69mychevy · 07-05-2002, 11:31 AM

jhickson and dion, i will not be able to post a picture of the undercarriage till afternoon of the 6th sorry
jims70gmc, a few things, one im gonna try and switch the tires, two im positive that it is vibrating only when im accelerating, and its a 4wd so which ujoints do i check, cause its not in 4wd hardly ever, also what do u mean is the front drive shaft spinning, u mean when its not in 4wd? how do i check that?

67_chevy_67 · 07-05-2002, 11:42 AM

probably driveshaft and u joint

69mychevy · 07-05-2002, 06:57 PM

hey 67 chevy 67 what could be wrong with the drive shaft? could it be messed up where it goes into the transfer case or what? how do u check the ujoints to see if they're bad?

hanssolo · 07-05-2002, 11:59 PM

Undo the carrier bearing bracket and the 4 rear u-joint saddle clamp bolts. I've got a 2-piece, had bad rear joint I replaced 2 months ago. Bad vibration at about 35 up but it never clunked so I don't think you can trust that for a sign every time.

Longhorn Man · 07-06-2002, 12:05 AM

With his rig being a 4X4, There should be no carrier bearing if I'm not mistaken..that's why he was so confused. However, i do agree to remove the driveshafts (yes...both) and inspect the U-joint bearings, then roll the shaft on a good flat piece of pavement looking for a bend. If there is any question about it being straight or not...go to a pro and pay him to look.

69mychevy · 07-06-2002, 03:54 PM

longhornmail is right it doesn't hav a twopiece driveshaft cause its a 4x4 i wanna drop the driveshaft and check the ujoints but how do i take it off, properly??

07-04-2002, 08:19 PM	#1
69mychevy yes i did post something Join Date: Jun 2002 Posts: 244	i need your help! hey everybody june 30th i posted a question that looked sumthin like this: my 69 chevy sometimes will vibrate at 445 or 50 and sometimes not until 65, how do i fix it, is it u-joints?? driveshaft?? i hav to go on the highway with this truck and i can't when its vibrating, and its not at high rpms when its vibrationg only like 2000 i got a lot of answers but i don't think many of them are right because it is in such a range of speeds and rpm's so it couldn't b u-joints or driveshafts could it? if it is tell me, if not tell me what u think it is

07-04-2002, 08:37 PM	#2
hanssolo Registered User Join Date: Sep 2001 Location: central Ill. USA Posts: 447	Did you ever drop the shaft and check the U-joints? __________________ 69 C10 longbed: 357c.i. /TH400/3.73s/AC/ beige primer/saving $ for paint ______________________________

07-04-2002, 08:49 PM	#4
69mychevy yes i did post something Join Date: Jun 2002 Posts: 244	im new at this ok im new at this first of all whats a carrier bearing and second of all how do u drop a drive shaft and what do u look for if a ujoints busted?

07-04-2002, 09:40 PM	#6
JHickson6 I Love This Stuff! Join Date: May 2002 Location: Winnipeg, Manitoba, Canada Posts: 739	forgot to post pic Attached Images

07-04-2002, 09:44 PM	#7
69mychevy yes i did post something Join Date: Jun 2002 Posts: 244	hey hey 3 things 1 i don't see a two piece driveshaft im prolly retarded but both driveshafts look the same just different lengths 2 i don't see that little carrier bearing anywhere 3 where do i get a chiltons or haynes book, anywhere off the internet?

07-04-2002, 08:46 PM	#3
JHickson6 I Love This Stuff! Join Date: May 2002 Location: Winnipeg, Manitoba, Canada Posts: 739	May have been said already but have you checked your carrier bearing? Notorious for causing bad vibrations and can kick in at any time? Check it out! JHickson6

07-04-2002, 09:34 PM	#5
JHickson6 I Love This Stuff! Join Date: May 2002 Location: Winnipeg, Manitoba, Canada Posts: 739	The carrier bearing is the bearing in the middle of you 2 piece driveshaft. This is what a new one looks like. As for taking apart the driveshaft, go out and buy a Chilton Manual or Hanyes Manual for your truck, it explains it all. JHickson6

07-04-2002, 11:56 PM	#8
dion 72 Cheyenne Join Date: Oct 2001 Location: San Diego Posts: 2,086	Did you check the front end? The carrier bearing is a U shaped piece of metal in the middle of the two shafts bolted to the frame with rubber in it that the shaft goes through, mine is bad too but it dosen't make my truck vibrate. I doesn't sound like the U joints to me. __________________ Burnout Idle 1972Cheyenne 1966/67Stouts

07-05-2002, 07:38 AM	#9
JHickson6 I Love This Stuff! Join Date: May 2002 Location: Winnipeg, Manitoba, Canada Posts: 739	I would try find a way to take a picture of the Undercarriage and driveshaft with the help of some one who has a digital camera or take a regular photo and then scan it. Then we can see what you have! Those manals are available on the internet, at bookstores, local auto parts stores! Good Luck JHickson6 __________________ My Rides 1967 C10 In Pieces for now 1985 Ford B700 SourPuss Bus - BIG BLUE 2003 Silverado CITY WORKER YELLOW!!

07-05-2002, 08:37 AM	#10
johnnyp Keepin' It Stock Join Date: Aug 2001 Location: Grand Island, Nebraska, USA Posts: 554	Do you have auto tranny? If so, take a look at this - could be worth a shot ---- Torque Converter shudder is usually not the first guess that mechanics and non-mechanics will make when this symptom first surfaces. Complaint: What you usually experience is a slight shake or vibration in third or fourth gear that is downright annoying. It has a certain "washboard road" feel in the seat of your pants. Drivers usually just live with this problem until they can't stand it anymore. Cause: Torque converter shudder is very simply caused by worn-out transmission fluid. The lock-up clutch inside the torque converter is slipping/grabbing giving the shudder effect. The fluid is originally died pink at the factory so you can tell when the fluid is failing or oxidizing. It will turn dark red, then change to brown, and finally to black. Automatic transmissions are designed to slip as part of their normal operation. Poor quality fluid allows too much slip and eventually causes failure. In severe-duty vehicles like Police, Limo, Taxi, the fluid quality is much more crucial. Solution: Use an Automatic Transmission Fluid Exchanger/Flusher to completely remove the old fluid every 20,000 miles (severe-duty). This process ensures that the fluid is reset to 100% performance efficiency. The torque converter lock-up clutch will no longer chatter. We have seen this happen hundreds of times in our on-site maintenance operation. If your fleet is within 400 miles of Detroit, MI, contact us regarding on-site maintenance. __________________ 72 Sierra Grande - Maych Forget about "do it right the first time". Do it wrong the first time to learn how, then do it right the second time.

07-05-2002, 08:47 AM	#11
Paul Clark Registered User Join Date: Apr 2002 Location: Center Point, IA Posts: 502	Something cheap to try - Check the air pressure in your tires. Then, rotate them. Can't hurt. Might help.

07-05-2002, 11:23 AM	#12
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	Could be a radial tire problem or out of balance tires. For the radial problem swap tires side to side. If both tires are out of balance they could be compounding then cancelling the vibration you drive. You will feel an u-joint during acceleration. If this is on a 4wd is your front drive shaft spinning? Fill in your profile, there could be someone close to you to lend a hand. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

07-05-2002, 11:25 AM	#13
69mychevy yes i did post something Join Date: Jun 2002 Posts: 244	Paul Clark, thanx for the tip im gonna try that Johnnyp i don't hav an auto tranny any other ideas? Dion, i don't think i hav a two piece driveshaft with a carrier bearing so for u and jhickson i'll try to post the undercarriage. Dion how do u check the front end??

07-05-2002, 11:31 AM	#14
69mychevy yes i did post something Join Date: Jun 2002 Posts: 244	thanx again everybody jhickson and dion, i will not be able to post a picture of the undercarriage till afternoon of the 6th sorry jims70gmc, a few things, one im gonna try and switch the tires, two im positive that it is vibrating only when im accelerating, and its a 4wd so which ujoints do i check, cause its not in 4wd hardly ever, also what do u mean is the front drive shaft spinning, u mean when its not in 4wd? how do i check that?

07-05-2002, 11:42 AM	#15
67_chevy_67 Registered User Join Date: Jul 2002 Location: BC,CANADA Posts: 34	probably driveshaft and u joint __________________ if u know any one with a 67 chev c-10 shortbox for sale tell them to email me at rylan_hodge@hotmail.com



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07-05-2002, 06:57 PM	#16
69mychevy yes i did post something Join Date: Jun 2002 Posts: 244	i need your help hey 67 chevy 67 what could be wrong with the drive shaft? could it be messed up where it goes into the transfer case or what? how do u check the ujoints to see if they're bad?

07-05-2002, 11:59 PM	#17
hanssolo Registered User Join Date: Sep 2001 Location: central Ill. USA Posts: 447	Undo the carrier bearing bracket and the 4 rear u-joint saddle clamp bolts. I've got a 2-piece, had bad rear joint I replaced 2 months ago. Bad vibration at about 35 up but it never clunked so I don't think you can trust that for a sign every time. __________________ 69 C10 longbed: 357c.i. /TH400/3.73s/AC/ beige primer/saving $ for paint ______________________________

07-06-2002, 12:05 AM	#18
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	With his rig being a 4X4, There should be no carrier bearing if I'm not mistaken..that's why he was so confused. However, i do agree to remove the driveshafts (yes...both) and inspect the U-joint bearings, then roll the shaft on a good flat piece of pavement looking for a bend. If there is any question about it being straight or not...go to a pro and pay him to look.

07-06-2002, 03:54 PM	#19
69mychevy yes i did post something Join Date: Jun 2002 Posts: 244	hey longhornmail is right it doesn't hav a twopiece driveshaft cause its a 4x4 i wanna drop the driveshaft and check the ujoints but how do i take it off, properly??

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