Builds AK HJ-75 (5 Viewers)

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here's the dyno graphs.

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I’ve been having vibration issues for a long time. All front links have been replaced, knuckles serviced, no rough king pin(?) bearings. New tires and balanced twice. Friend suggested a U-joint. So ordered some new ones and today I removed the rear drive shaft. One of the joints had a rough spot in it. Spent a lot of fun time today replacing it. Unfortunately I couldn’t get one of the bearing cups to seat completely, enough to install the C clip. So on that one I ran some safety wire. Hopefully that will be ok🤷‍♂️🙂

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Replaced the other U-joint. Still have vibrations but slightly different 🤷‍♂️ If I can’t figure this out by the end of the week, no vacation trips with the Ute. Don’t want to drive 1000mi with this kind of vibration.

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looks like you are doing good job. I replaced my uni joints recently too, gave the drive shaft a good clean up. Was thinking of taking it to the pro driveshaft balance folks if I still got the vibes, but turns out it is fine at 115km/h... Got the front wheels re-balanced firstly.
The vibe difference between 60 and 65m/h may suggest a slight imbalance? Wheels balanced? Wheel balance lugs can come off, this happened to me too.
 
Do you have a good driveline shop where you live? I had a similar thing on a first gen dodge. Got the drive shaft re balanced. Was way better. Just a thought.
 
Do you have a good driveline shop where you live? I had a similar thing on a first gen dodge. Got the drive shaft re balanced. Was way better. Just a thought.
Yeah that’s my next move. I have a bad shock in the rear and have a replacement that has been riding around in the back of the dhl van for two days🙄 first stop today is dhl. If this doesn’t fix it then off to find a shop that can check for balance of the drive shaft and get it back to me by Friday
 

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