You will have to bleed if you remove the ABS Modulator. If you can do it without removing the Modulator. then no you should not have to bleed the system.

 

If you replace the shuttle valve seals (which are known to leak and cause the switches to fail) you will have to remove the modulator, and bleed the brakes.

 

Thanks guys!
I am in away from home and will try this next weekend when I get back.
I also get the vibration and sound just like when ABS kicks in, every time I step hard on my brake pedal. I am not sure if this is typical with 3 Amigos being active but I thought I share this info. Any thoughts on this?

 

I had the 3 amigos on for 2 weeks, but never heard a noise when stepping hard on the brake.

 

I also never got the noise or vibration when applying the brakes when I had a case of the Amigos.