| I think that you are wrong to state that a TH400 "suck[s] a ton of power." I'm not sure what a "ton" of power is but I am quite certain that it's not any more than a Nissan auto trans. It is widley published that a TH400 takes about 30 HP to drive the pump. The fact of the matter is that EVERY automatic transmission requires some power to drive the pump; it is the pump that delivers the pressure that is necessary to apply the clutches to transfer the power through the transmission. The more power you want to be able to transfer, the more pressure needed to hold the clutches. You cannot say that your modified Nissan auto does not rely upon higher pressure than stock to hold the clutches, to do so it requires a comparable amount of HP to drive it as well. "...they have no lock up, so the converter is always slipping." Well, I would hope so, that's what a torque converter is designed to do... no slippage means no torque multiplication. The truth is that a non-lockup torque converter can easily reach 95+% efficency even at cruising RPMs. The lockup is for people that are concerned about every last bit of gas mileage, not about making more HP. I hope you don't actually recommend engaging the lockup under full throttle, making 700+ HP? "The only advantage to the [TH]400 is it is much lighter than the Z trans." Thank you, I will add that this weight difference is primarily rotating mass... which = less power to accelerate - or could I just call it a "ton"? You go on to say "When the Z trans is built correctly it is WAY better than a... [TH]400". This is quite subjective and I'm certain "built correctly" = a "ton" of $$$. Furthermore, I doubt the Nissan auto could ever be economically built to deal with the base TH400s starting point of 1000 HP, let alone 2500 HP. There might not be many Zs capable of 1000 HP yet, but they are coming and the TH400 will be there for them. Yes, each transmission has its own advantages and likewise disadvantages but I must ask, why do you feel the need to discredit the TH400 option with bogus claims and subjective cons? It is a viable option and there is room in this market for both to exist.
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