1969 eldorado transmission shudder?

[dirtycustom40]

Got up early and drove up to santa fe and back.Correct balance and weights helped greatly but did not cure the problem 100%.Ride is smooth till around 75-77 mph then it starts doing its thing again but not near as bad as before but it still comes and goes as it pleases.I still dont have any shake in the steering wheel.It feels like its coming from the right front and feels like something between a shake and a hop.I cant find a single thing worn or loose.I think ill pull the rotors off in the next couple weeks and have them set up on a brake lathe and check them out.

[TJ Hopland]

What size are the weight(s) on the front tires?   One thing I noticed on the previous set I had on my eldo is there usually tended to be larger weights on it.   I think one of the tires had a 3 with a smaller one real close to it and then a couple 2's on the other side.  I remember one shop telling me it was just a junk tire and even though it would balance it was never going to run smooth especially with the offset those cars have.  Apparently the offset is sort of like adding leverage to any imbalance.   My new tires which are 90% better than any I have had in the past as far as smoothness the largest weight is a 1 oz.