I Have A 1940 Ford Pickup With A New 350/350 Combo,8 Inch Rearend, On A 1983 Ranger Frame.runs Real Sweet, But Here Is My Problum.i Have Checked My Angles Time And Time Again, I Was Told 3 Dagrees In The Front End Rear That Is What I Have.the Part That Drives Me Wild Is The Vibration Only Happens When The Truck Is At 50 Mph And Has Been Drove For 3 To 5 Miles It Dosnt Happen Till It Seems Like The Truck Is Warmed Up If Anyone Has Clue Let Me Know. Its Driveing Me Nuts!!!!!!!!!!!!!!!!!
I know you may be smarter than i but its a possibility, Have u checked if the parking break is on? I kno who could be that dumb. I am. I was leaving a friends house and the car started violently shaking around 45 mph n i had no idea what was wrong untill i got to my other friends house and relized i forgot to take off the parking break. Stupid stupid me.