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Old 02-11-2019, 07:42 PM   #26
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Re: Chasing vibration

I had like 15 year old tires that did that.

Thought it was pinion angle, nope, carrier bearing, nope.

Replaced rear tires, smooth as glass.
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1970 C15 GMC Long Bed
1986 C20 Scottsdale (grandpa truck)
1964 Impala SS
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Old 02-11-2019, 11:09 PM   #27
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Location: Kingsburg, Ca.
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Re: Chasing vibration

Originally Posted by morepwr View Post
Check the motor and transmission mounts. I had a weird vibration in a car and it was the transmission mount. It looked fine but once I unbolted it, it was in two pieces.
Same here, 67 Dodge Dart had a rumble that cycled on & off at hi-way speeds. Figured it was something that was rotating until I discovered I could hear the rumble just sitting at the curb in neutral. The transmission mount had lost the rubber damper and there was a metal to metal contact allowed. New trans mount and quiet cruising was restored.
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Old 02-12-2019, 03:49 PM   #28
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Re: Chasing vibration

The 2 that caught me by surprise were , pinion bearing , and shocks
68 Long Fleet , ly6 , turbo 350 , 3-5 drop , original paint , front discs
67 Small window , 7 foot bed , tweaked 6.0 LSX 2004R Medium Olive
58 Apache fleet , 235 , offy intake , dual exhaust , 4 on the floor , red/white
69 Long Fleet , Custom , 6.0, 4l60 , AC , Medium Olive
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