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10-27-2007, 11:53 PM
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#1 |
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Registered User
Join Date: Oct 2007
Location: Spanaway
Posts: 8,451
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oscillation vibration?
I used to own a 76 Chev 4X4, it was full time when I bought it, I installed the conversion kit and put locking hubs on it.
This truck had this oscillation vibration at certian speeds, I think it was it was only in a 5 MPH range around 60mph, anything above and it would stop, anything below and it wouldn't do it ether. it did it before and after my mod. The vibraton was kinda like 4 seconds on and 4 seconds off, just a steady rhythm intil I changed my speed. I know what a tire feels like, its a steady vibration at certian speeds, so I allways figured it was in the drive train somwhere but never figured it out. Anybody experiance this and know what causes it??
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Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's |
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10-28-2007, 01:35 AM
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#2 | |
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Bloo
Join Date: Feb 2001
Location: Barren County Kentucky
Posts: 6,283
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Re: oscillation vibration?
im gonna watch this one closely!! ive got the same thing in my 89 from 30-35, mines a little faster but it is the oddest vibration ive ever felt.... and im a GM dealer/ASE certified mechanic!! im starting to think driveshaft in mine
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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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10-28-2007, 03:06 AM
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#3 |
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Registered User
Join Date: Apr 2007
Location: Freedom CA
Posts: 488
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Re: oscillation vibration?
Worn rear axle?
__________________
68 Chevrolet k20 Longbed 350 SM465/205, Dana 44, 14bolt, Power steering, Power Disk Brakes, 35" BFGs. 84 Chevrolet Suburban K20 6.2 Banks turbo TH400/NP208 Now with G80 68 GMC C20 Parts? Truck And a few cars 
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10-28-2007, 10:43 AM
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#4 |
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Blazerless
Join Date: Nov 2006
Location: Kelowna, BC, Canada
Posts: 274
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Re: oscillation vibration?
My father in-law's 94 Blazer did the same thing. Apparently it was something in the transmission, once the tranny got replaced it stopped doing that. I have no idea what in the tranny caused it. If you get out of the throttle and back on again, does it stop? That's what his did.
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72' K5 Blazer 4x4 350TBI/700R4/NP205 3/4 ton diffs. Daily driver. SOLD  69' Beaumont 388/700R4 11.70@116  77' Bronco, Wife's mall cruiser/poser 4x4. Capable but too pretty to go offroad. |
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10-28-2007, 05:26 PM
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#5 |
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Registered User
Join Date: Apr 2007
Location: Freedom CA
Posts: 488
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Re: oscillation vibration?
Come to think of it, I've fixed that by tightening an output yoke nut....
__________________
68 Chevrolet k20 Longbed 350 SM465/205, Dana 44, 14bolt, Power steering, Power Disk Brakes, 35" BFGs. 84 Chevrolet Suburban K20 6.2 Banks turbo TH400/NP208 Now with G80 68 GMC C20 Parts? Truck And a few cars
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