Ok, I have a 29 Powerquest T-330 454 - when running at 3000 RPM i get a slight 3 second vibration .... then fine for 5 second then another 3 second vibration. My fault i totally forgot to do the pull the drive and do the U Joints it has been 2 years. I put may bee 25-35 Hours on in a year. My Fiend who is a talented mech said to get New U joints and a Gimble while we have the drive apart ?

Just Wondering your thoughts?

Thanks
Steve

sounds like u-joints.

check your prop shafts make sure they are not twisted, just found one of mine that are twisted and have to get it fixed and i have to figure out that today myself lol.

Took off the drive had a Friend help me. Not as easy as it looks on youTube but we are back up and running and it felt good.
Thanks you for the assistance.

Steve

Was it the u joints then?