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so if any of you have been following my other thread i have been having a soft brake pedal after installing new front calipers.the lines have been bled numerous times ,the master cylinder has since been replaced. i squeezed the rear brake lines and i get a hard pedal,squeezed thr FR caliper line and get a hard pedal but its impossible to isolate the RABS module as it has hard lines.does anyone know how to isolate it with the correct fitting or even better bypass this dinosaur technology all together?
I don't think it wise to defeat the RABS. If you think there is restriction there, simply fashion by-pass lines to test. Unwise to cut brake lines IMO.
Why did you start a new thread? Where is the old thread?
Are you trying to test it or remove it? There's a company that used to make a kit to thread the existing fittings into. A 3/16" brake line compression coupler is about $3 and there is zero risk of kinking the lines trying to line them up or twisting them off if they are corroded to the fitting
As I understand it the rabs gets its signal from the rear ring gear speed sensor and uses a predetermined normal slow pattern to determine safe braking. There are no front wheel speed sensors or transmission or tc sensors used. the rabs works by dumping the rear brake pressure entirely (not just enough until the rear wheels release) and continues to do so until you release the pedal. Essentially if your rear wheels start to slip, it cuts the rear brakes entirely. This is how I've come to understand the system. It's probably great for an empty crew cab long bed srw truck with a regular bed on rainy and snowy days.
Yes I've been through the same inside and out! The only thing I can think about that would be for a soft pedal is the rear ABS module. It's not really a big deal to bypass it all together you just get a harder brake pedal in the rear
Well i know you had mentioned that you recently did the rear brakes, i just wanted to make sure you still removed them and checked them first. If it's working properly bypassing it isnt going to help your soft pedal.
Ok... just trying to track down what in the actual hell could be causing this! I am not new to brake systems but I am just at my Wit's End of This soft pedal
So you have definitely removed the rear drums since you did the rear brakes and double checked everything? Maybe post pictures here and someone could pick up on any issues? There is a part that came on IDI F450s with hydroboost i believe that bypassed this part but still used the same lines
So you have definitely removed the rear drums since you did the rear brakes and double checked everything? Maybe post pictures here and someone could pick up on any issues? There is a part that came on IDI F450s with hydroboost i believe that bypassed this part but still used the same lines
yes I removed the rear drums and inspected everything and there's no leaks but no I did not replace the rear brakes I replaced the front calipers and that's when the issue started.
I don't think it wise to defeat the RABS. If you think there is restriction there, simply fashion by-pass lines to test. Unwise to cut brake lines IMO.
Why did you start a new thread? Where is the old thread?
07-07-2017, 06:46 PM
