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

steeeeeve · 01-12-2021, 05:42 PM

hi fellas

68 c10
350
700r4

the truck is running great but if i'm cruising +-60mph with about 1/8 throttle to maintain speed i get a vibration that feels like i'm running over small shoulder bumps. if i let off the gas it goes away, if i give it a touch of gas it goes away.
i can't tell if its the engine or transmission.
any ideas what to look for? or just avoid 1.8 throttle position?
thanks steve

**** i'm thinking it's getting lean between idle circuit to cruise

01-12-2021, 05:42 PM	#1
steeeeeve Registered User Join Date: Nov 2018 Location: austin Texas Posts: 37	vibration maintaining cruising speed hi fellas 68 c10 350 700r4 the truck is running great but if i'm cruising +-60mph with about 1/8 throttle to maintain speed i get a vibration that feels like i'm running over small shoulder bumps. if i let off the gas it goes away, if i give it a touch of gas it goes away. i can't tell if its the engine or transmission. any ideas what to look for? or just avoid 1.8 throttle position? thanks steve **** i'm thinking it's getting lean between idle circuit to cruise Last edited by steeeeeve; 01-12-2021 at 06:24 PM.