Ok so I'm not really sure what's wrong I've had a few places tell me it's torque converter but I don't know if it's that or my clutches slipping. If anyone knows what's up with it it would help a lot. It's an 2001 lb7 and it shifts fine no real problem until I get in the gas real hard. My rpms spike and boost builds but It just doesn't go. It feels like I have all the power it's just getting lost in the trans has anyone had this problem before? The truck is all stock with efi tunning