I have an 87 gxl and when I shift into 5th I get a vibration. It's a constant vibration in that it happens everytime I shift into 5th, but it's kind of a gyrating vibration. Does anyone know what this could be?

 

U joints, driveshaft. be more specific does this happen at high speeed or just cruissing arround? how are your tires? when was the last time you had an alignment?

 

Replaced the drive shaft about a month ago. I notice it more at high speeds. I don't know when the last alignment was done. I just got the car 1 1/2 months ago. I'll try that tho