Two to me it just make more sense to me as an individual in the modern day to run a 4 or 6 speed as compared to 2 and 3 speed box. One I feel they give the user alot more choice in application, meaning even though these transmissions are intended for drag racing they can be used for much more. I chose to make 4 and 6 speed boxes for a couple of reasons.

Now as for the valve body, for those who don't know a vavle body is effectively the brain of an automatic transmission, a full manual as it implies causes the shifting to be entirely manual, automatic manual gives you a drive gear and the ability to shift manually, and an automatic gives you a drive gear and in most cases the ability to hold 1st and 2nd gear. There is an inherent trade off you have to make if your run a car fully on converter, that's why I also gave the option to lock up the converters, this way you can get all the crazy launch you want and not have to worry about losing out on the top end up by blowing through a converter. The 3 torque converters go as follows: the 'Low Stall Converter' which is set up to be capable to handling all the torque that a full boost and spray car can produce, the 'High Stall Converter' which is set up to allow you to launch at full boost and/or peak torque when using the transbrake, and the 'Medium Stall Converter' which is somewhere in between. Each torque converter has the ability to lock-up if the user feels such is necessary for their application, this lockup is completely tuneable with both minimum gear and rpm adjustment.

All of the transmissions come with the ability to tune each gear to your liking, get a choice of 3 torque converters, shifting valve body and a transbrake. Every car (aside from the pigeon and semi) now have options for a 4 and 6 speed drag oriented transmission.

Better with mods gearbox