The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 1968 GMC

Leonard1 · 08-07-2020, 08:36 AM

The vibrations at certain rpm's makes me think the driveshaft angles aren't matched. I don't remember how much you dropped the truck, but you may need a shim for the rear end?

08-07-2020, 08:36 AM	#370
Leonard1 Registered User Join Date: Nov 2005 Location: Paducah, Ky Posts: 393	Re: 1968 GMC - Ol' Blue The vibrations at certain rpm's makes me think the driveshaft angles aren't matched. I don't remember how much you dropped the truck, but you may need a shim for the rear end?