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12-19-2015, 07:50 PM
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#1 |
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Registered User
Join Date: Aug 2015
Location: Nashville, TN
Posts: 49
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Vibration
Gents,
I have a slight vibration when I am traveling between 50 and 60 mph. I feel it all over pedal and steering wheel. Its seems to be also shaking the whole car. Could this be a issue with the 5.3 LS swap I have on the truck. Meaning could this be a issue with the cross member or motor mounts? Last edited by C10CONFUSED82; 12-19-2015 at 07:54 PM. Reason: Spelling |
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12-19-2015, 08:12 PM
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#2 |
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Senior Member
 
Join Date: Jul 2000
Location: North Texas
Posts: 3,599
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Re: Vibration
More than likely it's something in the drive line, such as as a slightly bent or out-of-balance drive shaft, or maybe an improperly installed u-joint.
Is it RPM or road speed related? In other words, does it vibrate at 50-60 even in a lower gear?
__________________
Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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12-19-2015, 08:42 PM
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#3 |
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Registered User
Join Date: Aug 2015
Location: Nashville, TN
Posts: 49
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Re: Vibration
Not sure, I have not noticed it at lower RPMs but it does go away when I go faster.
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12-19-2015, 10:06 PM
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#4 |
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Registered User
Join Date: Oct 2011
Location: Tallahassee, FL
Posts: 44
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Re: Vibration
Front wheel not balanced or loose lug nuts? Separating rubber on a tire?
I have had a wheel weight fly off and cause the same vibrations. Good luck!
__________________
Mike McGinnis 1990 V3500 Crew Cab build http://67-72chevytrucks.com/vboard/s...d.php?t=559196 1983 C10 Step Side Old Friend http://67-72chevytrucks.com/vboard/s...45#post7266145 |
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12-19-2015, 10:06 PM
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#5 |
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Robert Olson Transport
 
Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,313
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Re: Vibration
make sure the front end is tight and make sure you tightened up all the motor and trans mounts
__________________
Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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12-19-2015, 10:44 PM
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#6 |
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Registered User
Join Date: May 2013
Location: Houston Texas
Posts: 713
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Re: Vibration
C10confused82,
I also have an LS swap and have a bad vibrations that starts about 45 mph and stays at any speed above it. I have tried many things. I have a new drive-shaft, new rotors and pads, new alignment,, new axles, seals and bearing, new tie-rods, etc. and still have the vibration. If the vehicle is in park or neutral and I rev the engine there is no vibration. The only think I can think of now is the transmission angle is too much. I bought a high hump trans cover that I will be installing along with a new trans cross member which I will install next week to see if this takes care of the issue. If it doesn't than I am at a loss. I is driving me nuts and makes the truck no fun to drive.
__________________
1986 C10, 2011 5.3 w/6L80, 3.42 w/ Detroit TrutTrac Build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=584532 |
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12-20-2015, 07:11 AM
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#7 |
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Registered User
Join Date: Mar 2015
Location: Manchester, CT
Posts: 433
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Re: Vibration
Have you checked your driveline inclination? That's where the trans. output shaft angle should be within 3*-5* of the differential pinion angle (opinions vary on the degree but it's usually within that parameter). It's easy to find, using a simple and inexpensive angle finder bought at the local hardware store or big box outlet (Lowes/Home Depot)
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12-20-2015, 09:33 AM
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#8 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,736
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Re: Vibration
Some info to figure out vibrations.
http://www.drivetrain.com/parts_cata..._problems.html Or this. http://www2.dana.com/pdf/J3311-1-DSSP.pdf |
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12-20-2015, 11:07 AM
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#9 |
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Registered User
Join Date: Oct 2013
Location: Maine
Posts: 2,376
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Re: Vibration
c10confused sounds like a wheel balance issue. I have never had a perfect balance so I never expect it. Mine will vibrate around 62 mph and goes away completely at 65 mph. Houston Ben sounds like he has an annoying driveling angle problem. That will take some work.
__________________
76 Chevy K20 76 GMC K15 77 Chevy C10 77 Chevy K10 |
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12-21-2015, 10:48 PM
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#10 |
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Registered User
Join Date: Oct 2015
Location: Waskatenau, Alberta
Posts: 259
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Re: Vibration
Do you have a two piece drive shaft? Had a similar problem with a truck a picked up a few years ago. Turns out the previous owner replaced the ujoints. When he reassembled, the weights on the front section and rear section were opposing, causing the vibration. The weights on both front/rear must be on the same side. I would have NEVER figured this out.... an old Mechanic buddy of mine "clued" me in....
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