If built correctly... it should not be a problem with the trans. But, with times approaching the 10`s as you are, it is a good idea to upgrade axles.
Now, your tires may be a limitation on the harder launches.
One of my customers (shameless plug), John Plog, is approaching 300 passes this year with nearly all of these being transbrake launches.
So, I personally do not think it is that much more abusive in a well thought out build.
I also believe your builder was making these brakes for a time, so it "should" be fine.
HTH...
Brian Hofer
Now, your tires may be a limitation on the harder launches.
One of my customers (shameless plug), John Plog, is approaching 300 passes this year with nearly all of these being transbrake launches.

I also believe your builder was making these brakes for a time, so it "should" be fine.
HTH...
Brian Hofer