# 1985 Chevrolet Silverado 1500 intermittent vibration under the truck

**URL:** <https://community.cartalk.com/t/1985-chevrolet-silverado-1500-intermittent-vibration-under-the-truck/161429>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, silverado1500\
**Created:** [March 20, 2020, 4:46pm UTC](https://community.cartalk.com/t/1985-chevrolet-silverado-1500-intermittent-vibration-under-the-truck/161429 "2020-03-20T16:46:47Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Seagraves](https://avatars.discourse-cdn.com/v4/letter/s/ea5d25/32.png) [@Seagraves](https://community.cartalk.com/u/Seagraves)\
**Post date:** [March 20, 2020, 4:46pm UTC](https://community.cartalk.com/t/1985-chevrolet-silverado-1500-intermittent-vibration-under-the-truck/161429/1 "2020-03-20T16:46:48Z")

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I have a 1985 C10 chevy truck and when I accelerate there is a intermittent vibration under the truck at about 65-70 and it stops as soon as I slow down or if I accelerate and drives like a dream before or after?

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**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\
**Post date:** [March 20, 2020, 7:23pm UTC](https://community.cartalk.com/t/1985-chevrolet-silverado-1500-intermittent-vibration-under-the-truck/161429/2 "2020-03-20T19:23:36Z")

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Though I would expect the symptoms to appear at any speed I would take a look at the driveshaft center support bearing. Could be exhaust system that manages to vibrate only at that speed.  
Have to get it up in the air on a lift or jack stands.  
Of course I am just throwing out some guesses.

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**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [March 21, 2020, 7:03pm UTC](https://community.cartalk.com/t/1985-chevrolet-silverado-1500-intermittent-vibration-under-the-truck/161429/3 "2020-03-21T19:03:13Z")

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My thoughts are along the same lines as @Purebred… driveline vibration. In addition to the center support bearing, check all the u-joints and check the pinion flange on the rear axle. None of them should wobble!