Hey y’all,
I’ve got this strange low speed (between 30-40 mph) vibration/shutter that occurs at low RPM. If I’m passing through an area with low speed limits it’s torture. Especially at 35-40 mph, unless i tap the gas to make it change gears then it goes away. I recently changed all 6 spark plugs and triple checked the gaps, they’re all between .30-.32 and i got rid of the MSD coil packs and put in 6 brand new OEM motor craft coil packs. Now I’m chasing this feeling. Truck has a 4.5” super lift kit, brand new front end, new U-Joints, differentials we’re serviced within the last 8k miles along with the transfer case and the trans drain and full service is coming up soon. The only other issue I’ve found on the truck will be handled soon, i have a leaking vacuum pump, extremely slight leak but I’m planning to handle it asap
I’ve got this strange low speed (between 30-40 mph) vibration/shutter that occurs at low RPM. If I’m passing through an area with low speed limits it’s torture. Especially at 35-40 mph, unless i tap the gas to make it change gears then it goes away. I recently changed all 6 spark plugs and triple checked the gaps, they’re all between .30-.32 and i got rid of the MSD coil packs and put in 6 brand new OEM motor craft coil packs. Now I’m chasing this feeling. Truck has a 4.5” super lift kit, brand new front end, new U-Joints, differentials we’re serviced within the last 8k miles along with the transfer case and the trans drain and full service is coming up soon. The only other issue I’ve found on the truck will be handled soon, i have a leaking vacuum pump, extremely slight leak but I’m planning to handle it asap