Quote:
Originally Posted by sleepydad
I wish I knew because I have had the same results on 2x trucks. TBU pedal feels ded to me, it's like a brick with no feedback as if the entire braking system is failing... sinking and the brakes are dying. the harder you press the less braking your getting and your going to hit something.
the same truck with stock caliper/toyota rotor and same Toyota ceramic type of pads brakes feel smooth and responsive with excellent feedback and ample braking with little or no extra effort required.
I don't know I wish I knew what the difference was? I just feel like I have complete control with the stock calipers vs this truck is going to kill me with TBU sinking pedal of death.
I would even say the brakes on my land rover work better than the TBU setup.
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So I had that issue as well on my SR5. I'm convinced that it's a combination of a bunch of little things. I'd bet your rear auto adjusters don't work. If not, your wheel cylinders are increasing in stroke as your shoes wear down. That accounts for an additional flow need.
Larger Calipers? Takes more fluid to squeeze. Additional Flow. I bet if you pump your peddle twice when slowing down it's significantly better on the second pump. At least mine was. Getting the rears tight helped a ton as well. Adding the larger MC was the final piece.
Now even when my rears are out I'm not past half travel. A second pump and I can lock all 4 with ease.
To be clear, both the 4Runner and T100 boosters are dual diaphragm, and you don't gain a lot of volume with the additional diameter. The only reason I changed the booster was to facilitate the install of a 4 bolt MC. Keeping everything Toyota kept me from having to change fittings or use adapters.
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18 Audi A6 3.0T - APR Tuned, RS6 Interior
19 Audi A6 3.0T