When I first bought my pickup in 2008 with a measly 275k mi, it had a soft pedal. Flushed the old fluid out. No improvement. Did all the other usual checks, bypassed the ABS, and decided to put a new master cylinder on it. Got a NEW Bendix from Rock Auto. Got it to bench bleed with both methods, put it on. Braking was improved, but not stellar. I just chalked it up to being a (then) 15- year old truck.
Fast forward 7 years and 185k (for a total of 460k) to now. Sheared 4 teeth off the original pinion, and installed a Dana 71, rather than put gears in my 3.54 D70. New brakes nd wheel cylinders. Got it bled, adjusted the rears, and pedal was still low.
Then I had a brainstorm (brain fart?). Unhooked the brake lines, hooked up the clear vinyl lines you use to bench bleed.
I kept an eye on the bubble in the lines. The line from the rear-feeding reservoir moved the bubble immediately, telling me the rears start to engage immediately. The line from the front-feeding reservoir didnt move til the pedal was almost halfway to the floor. Took it off, and put it in a vise. Had to push the cylinder ablut 5/16" before the fluid started moving from the big section of the MC.
My question is, shouldnt the fluid start flowing to the front and rear brakes t the same time? As it is, it appears my fronts arent getting any pressure build up until it has moved significantly. I have NEVER locked my brakes in this truck, despite bypassing the Govt-mandated "safety features".
It wold explain my lackluster braking, but I'm no brake expert, lol.