ButchB Posted July 24, 2020 Share Posted July 24, 2020 I just picked up a 2017 pinnacle chu613. MP8, air ride with meritor rears. MDrive trans. Noticed on the way home with it that at any speed over 50, it shakes and vibrates when you let off the gas. I can't really tell if its coming from the front or rear. As soon as I give it a little gas it goes away. Any ideas? Thank you Quote Link to comment https://www.bigmacktrucks.com/topic/63449-2017-chu613-vibration-on-deceleration/ Share on other sites More sharing options...
hatcity Posted July 24, 2020 Share Posted July 24, 2020 Check ALL u- joints and carrier bearing. Release park brake and let truck sit. Keeping tension on those areas may keep from movement Quote Success is only a stones throw away.................................................................for a Palestinian Link to comment https://www.bigmacktrucks.com/topic/63449-2017-chu613-vibration-on-deceleration/#findComment-456601 Share on other sites More sharing options...
mrgumby Posted July 24, 2020 Share Posted July 24, 2020 Don’t forget to make sure all your yokes on trans and rear ends are tight too. I usually chock the front wheels release the brakes and jack up the rears when I do this so it unloads the driveline Quote Link to comment https://www.bigmacktrucks.com/topic/63449-2017-chu613-vibration-on-deceleration/#findComment-456603 Share on other sites More sharing options...
ButchB Posted July 25, 2020 Author Share Posted July 25, 2020 I just chocked the front wheels, knocked the brakes off and check the driveline. Everything feels tight. The carrier bearing is the only thing clean under the truck so it appears it may have been replaced recently. I'm gonna go drive it and see if it goes away if I go to neutral while its vibrating. Quote Link to comment https://www.bigmacktrucks.com/topic/63449-2017-chu613-vibration-on-deceleration/#findComment-456645 Share on other sites More sharing options...
Dirtymilkman Posted August 5, 2020 Share Posted August 5, 2020 On 7/25/2020 at 8:48 AM, ButchB said: I just chocked the front wheels, knocked the brakes off and check the driveline. Everything feels tight. The carrier bearing is the only thing clean under the truck so it appears it may have been replaced recently. I'm gonna go drive it and see if it goes away if I go to neutral while its vibrating. Make sure the drives driveshaft is in phase. It does sound like a bad carrier bearing though. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/63449-2017-chu613-vibration-on-deceleration/#findComment-457703 Share on other sites More sharing options...
Miami Cossack Posted August 8, 2020 Share Posted August 8, 2020 On 8/5/2020 at 8:29 AM, Dirtymilkman said: Make sure the drives driveshaft is in phase. It does sound like a bad carrier bearing though. ESPECIALLY. this Quote Link to comment https://www.bigmacktrucks.com/topic/63449-2017-chu613-vibration-on-deceleration/#findComment-457984 Share on other sites More sharing options...
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