I have a 01 RCSB lowered w/ a DJM 4/6 drop, when I installed the drop I made sure that my pinion angle stayed the same....My issue is that when i hit the brakes at slow speeds and take off a little quick i feel this bump right under me, Im thinkin my drive shaft is sliding in and out of the transmission, if infact this is the case than how do I fix it? Its a 4.3v6 2wd, if that matters. Any help is greatly appreciated....

 

Sounds like you need an alignment kit. Belltech makes them.

 

Go back and make sure all the U-bolts are tight then make sure the drive shaft isnt to long since you lowered it..
If it is to long you can really damage the tranny..

 

Or make sure your angle is right. When I lowered my cc 3/6 my shaft would hit on dips, and by just looking at it it looked dead on until a buddy said add 2 degree shims and when I did I have been problem free for a month now.

 

http://www.belltech.com/alignmentkits.php

There's a nekid lady when you open the link.

 

Thanks guys, just orderd the belltech alignment kit...

 

You're welcome..... I promise that you'll see the difference. I have one on my 2/4 drop.