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09-06-2008, 10:16 PM
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#1 |
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Packrat
Join Date: May 2008
Location: Central Iowa
Posts: 459
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vibration question: 72 k20
'72 k20 w/4"lift
had a couple of vibrations when going over 60 mph. first would happen once I went over 60 mph, then when letting off the gas, there was a different vibration until I got down to about 55 mph. first vibration was taken care of by new tires/wheels, and a new tie rod end/alignment. second vibration is still there.... just between 55-60 while decelerating. thoughts?
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gone: --'07 Tahoe LTZ 4WD --'68 Firebird 400 Convertible gone: --'72 Chevy K20 |
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09-06-2008, 10:50 PM
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#2 | |
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Bloo
Join Date: Feb 2001
Location: Barren County Kentucky
Posts: 6,285
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Re: vibration question: 72 k20
check the splined slip yoke on the front of your driveshaft. your describing my truck almost spot on, i had a vibration from 45-50, then over 60... found 3 bent wheels. also had a vibration on deceleration from 65 down to 50 so i took the driveshaft to a driveline shop.. he inspected it and found the slip yoke to be worn VERY bad... he said that was causing it, but i cant gaurentee it because i have yet to have it fixed... the guy told me it would cost about $200 for both sides of the slip yoke, and welding and balancing the shaft.
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ASE Master Certified-GM Trained-Mechanic 1968 Chevy C30 157" WB Wrecker 1969 Chevy CST/10 SWB 1971 Chevy Custom/10 (first truck) 350, NV3500 5 speed 1971 Chevy K20 Custom Camper 4x4 350 TBI, SM465/NP205 1974 Chevy Custom Deluxe/10 1979 Chevy Custom Deluxe K10 farm truck beater 1989 Chevy K2500 Quote:
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09-22-2008, 07:46 AM
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#3 |
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Keepin it runnin!
Join Date: Oct 2007
Location: Deep River, CT
Posts: 1,036
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Re: vibration question: 72 k20
U-Joints ok?
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1970 K-5 4X4 Blazer  1970 K-20 4X4 Long Bed "Liberty Means Responsibility, that is why most men dread it" |
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01-06-2011, 12:24 PM
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#4 |
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Packrat
Join Date: May 2008
Location: Central Iowa
Posts: 459
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Re: vibration question: 72 k20
well, it's over 2 years later, and I finally got a new driveshaft
 the splines on the slip were worn as predicted. it finally started to get worse.. new shaft has lifetime spicer u-joints ( 1350 ) and the tube is slightly smaller diameter with greater wall thickness. the same tubes they use for the pulling trucks... 
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gone: --'07 Tahoe LTZ 4WD --'68 Firebird 400 Convertible gone: --'72 Chevy K20 Last edited by 72-c20; 01-07-2011 at 10:36 AM. |
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01-06-2011, 10:47 PM
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#5 | ||
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Registered User
Join Date: Nov 2010
Location: Northeast Pennsylvania
Posts: 334
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Re: vibration question: 72 k20
Quote:
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1967 K-10 4x4 with a 3" lift and 35" BFG mud terrains  Quote:
 want to see some slow progress on my truck? http://67-72chevytrucks.com/vboard/s...d.php?t=436560 <-click there |
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01-07-2011, 12:25 PM
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#6 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,863
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Re: vibration question: 72 k20
I bet it feels better at all speeds. She's tight now!
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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01-08-2011, 05:07 AM
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#7 |
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Packrat
Join Date: May 2008
Location: Central Iowa
Posts: 459
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Re: vibration question: 72 k20
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gone: --'07 Tahoe LTZ 4WD --'68 Firebird 400 Convertible gone: --'72 Chevy K20 |
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