I have to give a huuuuge +1 for a ZF tune but you have to make sure that your tuna knows what he's doing (either SCT or HP) It's fine to 'firm up' the shifts and set shift points for your needs but go too far and it may do damage to the trans apparently.....as well as give you whiplash. I've heard it said that firming up the shifts can actually help the ZF last a bit longer when you have heaps of power/torque. My 1-2 shift is a bit firm for me with just normal driving but 2-3 & 3-4 are supurb. Even though it shifts-grabs the next gear immediately, you just can't feel it...it is so smooth still. I downloaded a video that Biz did when he fitted the GTX..76 and compared his standard ZF WOT 2-3 change to a video I did when I installed the muffler delete. Biz looses a bit of kph on the shift as it slips and slides its way into the next gear where as my tuned ZF grabs the next gear (spins the friggen wheels a bit) and the kph just continues to rise. Again .. I must stress, make sure your tuna knows what he's doing. Let's see if I can hash tag it properly #tunedzf4lyf ^^ Is that right?