Drive Shaft Angle Question

Hello guys

Recently i lifted my truck about 3 inches all around. I have been experiencing some vibrations. I have already swapped the ECGS bushing and have had an alignment and tires balanced 2 times. Its driving me a little insane.

Im trying to correct drive shaft angles now and heres what i have done.

With nothing done, the angles are as follows


This puts Operating angles at 4.9* at TC to front driveshaft, 2.7* at carrier bearing to rear shaft and 6.3* from rear shaft to rear diff pinion angle

After reading a bunch of the forums and others who have had this issues i thought that flipping the carrier bearing 180* might help, the idea was to get the TC to driveshaft angle as small as possible and have the other 2 angles be as close to the same as possible. After flipping, the vibration are very very minimal. However the angles are a little concerning and im trying to figure out if its a problem or just what next steps might be.

Here is angles after flipping carrier bearing


This puts Operating angles at 1.9* at TC to front driveshaft, 7.3* at carrier bearing to rear shaft and 7.8* from rear shaft to rear diff pinion angle.

Is 7+ degree operating angles on u joints a big issues? Seems excessive, but it has reduced vibrations greatly. Would adding a rear shim be a good idea?

This is the video i have watched for reference
https://youtu.be/f1m-Fh5kiRU

 

This is a better forum for you post and more info https://www.tacomaworld.com/forums/suspension.18/

Don't make the same post in other forums, https://www.tacomaworld.com/threads/drive-shaft-angles-help.851497/

 

yep, i realized i clicked the wrong thing and posted, reposted over there

 

Put the carrier bearing back to the original position. Add a 2-3 degree shim under the rear leaf pack if not already done. From the carrier bearing to the rear diff the angles should be equal and opposite.

 

i ordered some 3 inch shims and will install and mess around with it once they get here to find best setup, but from my understanding i should try and have carrier bearing to rear driveshaft operating angle the same as rear drive shaft to rear diff angle and the TC to front diff angle should be as small of an angle as possible, which seems to be achieved with the flipping of the carrier bearing. The only issue seems to be the 7+ degree angles of carrier bearing to rear diff, although they are within 0.5 degree of eachother i dont think i can achieve much closer and flipping carrier bearing back to normal will put nearly 5 degree between TC and front driveshaft instead of 2 degrees.

1.9*,7.3*7.8*