Got a 07 LBZ CCSB 4x4, its got EFI live with 120hp tune but RARELY run it on that. Daily tune is a 65HP tune. Stock converter slipped on even the 30 horse tow tune so i had a LML Converter and a transgo jr installed about 20k miles ago. ive started getting a weird shudder/ jerking back and forth feeling when cruising between 45mph and 55mph basically 5th gear locked seems to get better when it hits 6th gear but it may be speed related and not related to what gear its in. Its hard to explain almost like a bouncing/jerking forward and back it does it when the converter is unlocked around 45mph but is for sure a little more pronounced when the converter locks at 50mph and continues to shudder but not as bad even when off the throttle and coasting. If i ease into the throttle the shudder seems to lighten up a little bit and does NOT get worse. The converter does not slip at all and holds power well. When the problem started i noticed i had a tire that was out of round so i thought that was it but i purchased 4 Brand new BFG KO2s and the issue got a little better but is still there. I know my rear shocks are shot but im not really thinking thats the issue! Thanks for any help!