The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Need ideas. 15yr old vibration that just won't go away

BigRandy · 02-12-2021, 01:45 AM

This is a long shot question but I didn't see it mentioned.

You have a 2 piece driveshaft. Have you ruled out the driveshaft carrier bearing?
Will it shudder under load with the brakes locked - no driveline rotation?
When it starts to shudder would you say the shudder matches engine RPM or driveline RPM? Knowing which one should at least tell you if the problem is behind or in front of the tail shaft.

02-12-2021, 01:45 AM	#18
BigRandy Registered User Join Date: Jun 2017 Location: San Antonio, Texas Posts: 156	Re: Need ideas. 15yr old vibration that just won't go away This is a long shot question but I didn't see it mentioned. You have a 2 piece driveshaft. Have you ruled out the driveshaft carrier bearing? Will it shudder under load with the brakes locked - no driveline rotation? When it starts to shudder would you say the shudder matches engine RPM or driveline RPM? Knowing which one should at least tell you if the problem is behind or in front of the tail shaft. __________________ Repairing and driving old trucks is an analog experience. No computers or sensors and they can be fixed with basic hand tools