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Just pickup 1966 6 cyl with T5 conversion / vibration without load?

W

Watchtrader

Member
Just won and pickup my 7th mustang in the last thirty years... This one I won off eBay and it is a six cylinder with a T5 transmission conversion. Noticed on the drive home at above 70 mph with no load (gas pedal off) get a vibration, give a little gas and gone, lower speed to under 50 mph and load or no load can feel the vibration.

Thoughts? U-Joint maybe and given this conversion from stock 3-speed which do I buy? I know owner had to shorten drive shaft but no vibration under load or pedal.

Thanks for advice will be asking many question as there are several bugs to work out with car.
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My vote would be the yolk. If the yolk has wobble ( is that a word ? ) it'll do that. Drive shaft imbalance would be there with or without load IMO.

Check to see if the yolk is inserted fully with enough penetration. :sarc
 
Yolk, is that adjustable or if too short I've got problems? Fully inserted I am worried maybe he did not measure drive shaft well enough... Will give it a look, thanks!
 
The yoke should not be bottomed out into the tranny either. I believe that there should be about 3/4 to 1" of slide room. At least this is what I remember from previous references from others on here.
 
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