Leaking grease out of front driveshaft ujoint

U joints do that. Which bolt was loose? You can see that top cup has been spinning. Definitely needs new straps

 

It’s coming from the slip yoke. They probably over greased it. There’s a pin hole at the end of the yoke. If you have air ride, the flexing up and down will compress the slip shaft and squirts the excessive grease out. Nothing to worry about. But the loose nut, could be a problem.

 

Replace straps and bolts and torque.

If the cap keeps spinning after strap replacement it needs a new yoke and u-joint.

It is normal for a serviceable u joint to sling grease after service. In my opinion if grease does not come out, it wasnt greased enough.

 

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