Torx you off, doesn't it? (I couldn't resist!). Seriously...there are many ways to compensate for a lack of strength nowadays. If you can borrow, rent or buy an electric impact wrench (1/2"), with some appropriate attachments...you can do just about everything...there are even flexible drives to get to hard to reach spots...I admire your efforts...good stuff.
I assume that you're using a torx drive attachment on your rachet wrench. I also assume that you don't have a 3/8-inch drive breaker bar.
If the wrench you're using is a 3/8-inch drive, ramp up to a 1/2-drive by using a 3/8-to-1/2 adaptor. If that doesn't work, try placing a pipe over the handle of your ratchet which effectively makes the rachet longer thereby giving you more leverage (torque).
There is a handy little tool known as an Impact Driver that work manually with a hammer or mallet. It features a 1/2 inch drive head that can be adopted to just about anything, there is an internal 'ramp' system that twistes the driver about 20 degrees each time you whack it. About $15.00 in any well stocked parts house. Go into google with 'impact driver', in the 'images' mode to see one first hand, I am talking about the manual one, not the power model, its about flashlight size and made of steel.
First of all know your enemy. You speak of torx bolts on brakes. This doesn't happen to be a Ford truck does it? Ford trucks and many others use threadlocker to hold important bolts from loosening. On some of them heat is required to soften the threadlocker and allow the bolt to be removed. If proper procedures aren't followed the threads can easily be damaged. Also when installing the bolts check for the proper torque specs. Many of these bolts require high torque to keep them from loosening. Be sure to tighten to proper specs.
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