Need some help guys....suspension ie. Pinion

[jonstreet]

My 99 4x4 is killing me. The truck has stock blocks and keys. I have changed the leafs 3 times now. Found a v6 WT that had bigger over load springs and cut down the old ones and put a leaf in the middle for more support. Have new shackles shocks spiders rotors pads u joints. I noticed about 30min. Ago at the local parts store a buddy has his 4x4 there and looked at his drive shaft. Str8 as can be lined up with the transfer case. Mine is like a ft. Off! How can a stock truck with no crazy lift be so off? Thanks for looking

[jcmd]

Got pics? Might help us understand better.

[jonstreet]

Sorry about that. Not getting back and all. Thought it was a pinion issue. We pulled the abs fuse and I've been driving for 24hr now with my leafs twisting and picking the back of the truck up. Then when I come to a stop the truck and on the brake the back picks up letting off the brake normally would drop the back of the truck almost like I was rear ended by someone. Crazy right? Could this be a speed sensor issues at the transfer case?