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Topic: 87 t-bird vibration (Read 564 times) previous topic - next topic

87 t-bird vibration

I recently acquired an 87 t-bird with the 3.8 that I am really starting to like.  One problem I just can't seem to figure is it has a vibration that comes and goes.  It almost has the feel of warped rotors but it sometimes comes in when I am just cruising on the freeway.  Seems to be centered under the center of the vehicle.  Almost always happens when I take my foot off the accelerator.  I had the trannie flushed and have tuned the engine which runs very smooth.  I wonder if it might be u-joint?  Any help?

87 t-bird vibration

Reply #1
It could be,does it do it when your on the brake?If not it probably is.
Reach under and grab a hold see if theres any play.
Old Grey Cat to this.88 Cat, 5.0 HO, CW mounts, mass air, CI custom cam, afr165's, Tmoss worked cobra intake, BBK shorty's,off road h pipe, magnaflow ex. T-5,spec stage 2 clutch, 8.8 373 TC trac loc, che ajustables with bullits on the rear. 11" brakes up front. +

brake

Reply #2
Stepping on the brake seems to make the vibration worse.  the vibration is more intense when braking, but does vibrate without the brake.  Maybe it is rotors and u-joints.  I don't know, could it be somthing in the trannie?

 

87 t-bird vibration

Reply #3
abs maybe? idk i dont have the abs system on my bird.. but thats my first guess if you dont have ABS, then it points to a wheel bearing.. or u-joint