Cateau

Deleted thread.

LOCO LAPTOP

When I did rear disc conversion on my 96 F150, I used the explorer master cylinder and F250 brake booster (had to redo the brake lines as well). However I ended up removing the ABS control module because I had issues with the speedo being accurate over 50mph, the needle would go up and down 5mph. no issues otherwise.

I would look at the RABS valve on the front driver side in the frame., I suspect that is the cause of the rear brakes not releasing.

Cateau

Thanks, I’ll look at that. Seems like there was a factory recall on something in that area but not sure.

Steve83

Swapping to brakes engineered for a smaller, lighter vehicle is not an upgrade. The RABS cannot detect what kind of brakes are installed, so the disk swap is not the cause of the ABS light, and swapping to disks wouldn't have fixed any RABS fault. Whoever said vibration would cause the pedal to lose response or turn on the ABS light knows NOTHING about vehicles. Same for whoever told you to gut the residual pressure valve. Your model year of truck uses precisely the same brake system as every other F-150 & Bronco from '80-96. RABS is just added on (like adding white letters to tires, or adding a BlueTooth receiver to a radio) and cannot cause the pedal to be stiff or cause the brakes to grab. Any travel trailer heavy enough to need a weight-distributing hitch is too heavy for an F150, and FAR too heavy for one with substandard (undersized) brakes. I highly recommend you put the original-style drum brakes back on and maintain them properly - they're superior to those little disks. This page & the NEXT dozen explain:

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Then diagnose the RABS system as explained on this page & the NEXT dozen:

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Cateau

Edited

Steve83

The whole truck is old & antiquated - no more so than the original brakes. And drums work EXACTLY as well as disks when properly maintained. Since your disks are obviously NOT, you'd have been dollars & hours ahead by simply repairing the drums.

Cateau

Edited

Steve83

Who are the best on conversions? And how did this person become the best of them? Converting what - brakes only? How many Ford truck drum-to-disk conversions has he done? Why didn't you let him do yours so it would just BE right? If it had any problems, he'd be able & responsible to fix them. Why did you ask here if you're already in contact with him?

And just to answer before you ask...
I've done ONE drum-to-disk conversion. It works perfectly under all conditions. I did not change anything other than the rear axle w/brakes & cables - not the RPV.

(click this text)


It was not an "upgrade" - it was just a swap.