Do I need to leave the shims in after I install the SYE or can they come out?

 

Leave em. The sye fixes the angle at the t case. The shims fix the angles at the pinion

 

i did shims after my sye. haven't had any troubles.

 

Thanks you I will leave them in.

 

I thought that the pinion should point up towards the output shaft if you are using a CV joint? something tells me I heard of the single U-joint going bad cause the pinion it not pointing up.

reference
http://www.4xshaft.com/driveline101.html

just my 2 cents, but it's your rig do as you please.

wait just seen this and they say that the pinion should be 2 degrees lower then the shaft to allow slight rotation of the single U-joint for lubrication.
http://www.4x4wire.com/tech/pinionangle/

 

With stock rear driveshaft...the pinion should point pretty much straight forward (just like the output shaft on the tc is pointing straight back). however, if you put in a sye and double cardon driveshaft, you need to point the pinion up at the rear output shaft. and as said above ^ keep it a few degrees below the angle of the driveshaft. this is accomplished with shims. a magnetic/stick on angle finder works great for this.