Yes. it's a little confusing.
A Manual VB with Low band apply will hold the band on until second gear is selected. With or without a Transbrake being part of it.
A Manual VB without Low band apply generally will not engage the rear band while in first. But if a Transbrake is also fitted ,it can utilize the rear band while the car is stationary with the Transbrake on, to take the load off the sprag while being loaded up on the start line..
This would help with bumping a car into the lights..
Problem is with that design is that as soon as you launch,( brake off) the band is released and if you load, unload the tires then the sprag gets a hammering.
May as well just keep the band on all the way to second gear.
