hawkj

I have 1984 5.0 GT mustang has been running fine untill a few days ago I get this vibration at 45-55 Mph.had drive shaft checked had bad front u-joint replaced both of them yet vibration is still there when I jack up the car and run it in gear to that speed vibration is there,I marked the flange and pinion flange to make sure I put it back right and not 180 out.my trans yoke (automatic) has a dampner ring does not look damaged .you guys got any suggestions.The vibration goes Hmmm-hmmmm-hmmmm and can feel it through the foor and dash buzzes.Thanks

frg_eyz

If you go faster does it stop?

ponysnake99

does your steering wheel vibrate too? it may be your tires are out of balance...but if it is, it is a distinctly mechanical sound?

GreyStang

Maybe the car tossed a wheel weight?

hawkj

Yes it stops at about 60 did not take it any faster though. this is not a wheel out of balance .