I have been having vibration issues after a 5cm lift kit. Vibration occuring only on heavy acceleration at 1600rpm to 2100rpm, in 4th and 5th gear. With OD off it seems to be worse.

From what I have seen failing inner cv shows the symptoms as well as a failing Auto transmission TC, and I want to find out which it would be more likely.

I have already removed the rear shaft to rule out rear shaft ujoint issues so it's not a rear shaft issue (vibration still evident with shaft removed). Also dropped the transmission 1cm.

Vibration is reduced when Jeep is loaded with 3 adults.

The inner CV seems to have a very small play (1mm) when I wiggle it, but the boots are fine as there are no rips.

Any tips would be welcome.

KJ

Seems I was mistaken about loading the Jeep and improving the shudder / vibration. I placed 140KG in the back, and shudder / vibration is still there.
I made a video recording to try and describe the noise.

https://youtu.be/bNcjKMZKDdo