MattP51

I have a cyclical vibration somewhere in the driveline at speeds above 85.

This is what I have done to solve:
New axels
rear ujoint straps torqued properly
new pumpkin
new transmission
motor rebuild
car is at proper ride heigth
different driveshaft (although I did not have the new used unit balanced)


I have heard of other classic Mustangs have this same prob but I never heard of anyone solve it.

Please give me some input, thanks.

cjperformance

balance your tailshaft first just to be sure. check the diff yoke for run out/ damage. check the clearance of the tailshaft yoke in the extention housing bush in the trans. if all is ok, does the problem occur in all gears when the engine is doing the same revs or does it only relate to road speed. if it relates to engine revs its an engine, fan, torque convertor if auto or clutch if manual problem. if it relates to road speed and every thing including wheel balance is ok it may well be the uni joint angle at the trans or diff causing it, spacers at the trans mount or wedges at the diff mount pads can correct this problem. what engine/trans do you have. any probs just contact me, i have cured a few of these. cheers

__________________
Craig Johnston.
Ford, Performance & Vintage engine specialist.
email- cjperformance@lizzy.com.au