Results for "f550"

Looked like just minor shifting hiccups in my F53 motorhome last month, but now the 6R140 transmission is completely failing and I'm scrambling to understand replacement options. Got an F53 chassis with the 6R140 transmission, and I'm wondering if I could source parts or even a whole replacement from an F550 that also has the 6R140.

Are these transmissions actually the same unit, or are there differences between the F53 and F550 applications? Trying to understand if parts would interchange and whether compatibility is something I need to worry about when shopping for repairs. …more

Noticed myself standing in the auto parts store staring at left and right speed sensors for my 2007 Ford F53 chassis with no clue which one I actually need. The left front wheel speed sensor went bad, but when I looked up replacement parts, I noticed something confusing - the right side sensor costs way less than the left side one.

I'm wondering if these sensors are actually the same part? Maybe the only difference is the wiring harness length? If that's the case, could I buy the cheaper right-side sensor and somehow make it work on the left side by extending the wires? I'd really appreciate any guidance on whether this is possible and if it could save me some money on this repair. …more

About a week after that heavy rain, my 2002 Itasca Sunrise 34D with Ford F550 chassis is giving me classic Ford wiring headaches while installing this Tekonsha Primus IQ brake controller. I've got the controller harness with bare wires ready to splice in, but I'm stumped on where to connect that red stoplight wire safely.

The Tekonsha documentation warns about older Fords having weird ground-switching brake circuits that'll fry your controller if you connect wrong. They specifically mention avoiding brake pedal switch wires that go 12V hot when pressed but drop to ground when released - which could kill the controller during manual override.

My brake pedal switch has four cables: a light green (12V hot when pressed/ground when released), light green with red stripe (constant 12V), blue with black stripe, and black with blue stripe. As an electrician familiar with 12V systems, I need to know the safe spot to tap into for the stoplight signal on these F550s without risking controller damage. …more