Overdrive light started flashing this week on my 2000 F450 7.3 mason dump. It only does it when it shifts into 4th gear once it hits that gear at about 35mph the overdrive light flashes until you restart the truck and it resets. Does the same thing all the time but DOESN'T flash if i'm driving around town on back roads and never get to that gear. Could this be something minor besides the transmission starting to go? It drives and shifts fine even when the light is flashing.

Any ideas while i wait to get the error code read?

 

Go get it read. Anything in the meantime, including speculation and guessing, is useless.

The basic readers at the parts stores probably won't be able to read the codes.

 

The best answer, Reps sent!

Standard auto parts stores cannot read transmission codes let alone communicate with a 7.3. Take it to a transmission shop or a Ford dealer to have the codes pulled.

 

When that light flashes, it's a transmission code. Like others have said, take it in and have the codes read. Guessing will do you no good. Good luck.

 

gonna try and have it read by my mechanic otherwise its to the dealer or tranny shop like you guys said. I was just wondering if there was a known common problem with these like a faulty wiring harness or sensor i could check in the meantime.

 

throwing code p1754 coast clutch solenoid circuit fault.

 

That is most likely a damaged wire to the coast clutch solenoid. It could be a bad solenoid, jot usually is in the wiring.

 

thats what i'm hoping as the truck runs and shifts fine. I'm gonna get under there this week and check the harness etc to see if there's a bad connection or a frayed or bad wire.

 

Sometimes you can find the bad wire just by looking. You almost always can find it by checking the harness electrically.

 

any spot these wires are known to go bad besides inside or right at the harness?

 

i also noticed if right when i start up the truck if i hit the o/d button to turn o/d off the code doesn't get thrown (o/d light never starts flashing) and it drives fine with no o/d. hopefully its just the wire harness otherwise maybe a bad solenoid where i'd have to replace the whole solenoid block ($200)?

 

my light started flashing and after reading some other posts i had my codes read p0741 any ideas what it might be

 

That code means the torque converter clutch didn't lock when it should have locked.

The first thing to do is clear the code and see if it comes back. I have seen this code set in error. It doesn't happen often, but it can happen.

If it does come back there are three possibilities. First, the torque converter itself is bad. Second, the seals on the input shaft are worn out causing internal leakage. This prevents the clutch from getting enough pressure to lock. And third, the torque converter clutch control valve in the pump body is stuck.

If it were a wiring problem or a bad torque converter clutch solenoid it would set different codes.

 

My 99 did that. My uncle is a a Ford master mechanic with 40 years experience And a trans tech. and he said my TC was going bad. He replaced it. Never had a issue again.

 

? My 2000 seams like it shift thru all 4 but act like the convertor wont lock? Od light is blinking? Is that what yours did