I need some help. I had someone else install my trans an 4 link I have had some vibration when you let off the gas. The drive shaft runs good an true. I'm not a drive line person but now I'm thinking my angles are off. Trans is down 8 degrees rear is up 6 degrees this is setting at ride height. With the shaft in it is going down hill towards the trans 3 degrees. Dose that make sense to anybody?