Rear disc brakes

The VSC equipped Tacomas use the electric pump boosted (not vacuum boosted) brake system from the other 120 platform trucks (4runner/Lex470/Prado/FJ) which all run 4 disks. Thats why your brake system buzzes and why you may feel a tickle or fant buzz under your foot when you apply the brakes.
I have a yet unproven pet theory that the poor brake feel we experience in our tacomas stems from the fact that Toyota put drums in a system designed for discs in the rear. As long as the mechanical advantage (usually determined by the volume ratio between the "master" and "slaves") is kept appropriate and the system is proportioned/biased correctly the conversion should not be too difficult for someone with access to a decent aftermarket shop. ABS should work fine as it tones off the hub and as stated earlier our systems are shared with trucks that run 4 discs.
The real question is why bother? seems like a lot of work for not that much gain to me.

 

I can't understand the fascination with rear discs.The truck stops fine and as Chris posted,better with drums..
All the more reason to put that rear disc brake money into another mod.

 

They might share the same ABS system...but they probably don't have the same master cylinder setup or proportioning as the Tacoma (disc/drum) has.

Drum brakes & discs are different in how they utilize the hydraulic pressure.
Disks require less fluid, discs don't require residual pressure or metering and gawd knows what else.

http://www.4wheeloffroad.com/techarticles/drivetrain/131_0708_4x4_disc_brakes/index.html

 

Great post.You're a solid and honest forum member.