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5R5R1110W Transmission Problems in F550 behind V10

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5R5R1110W Transmission Problems in F550 behind V10

 
  #1  
Old 03-14-2019, 06:58 PM
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5R5R1110W Transmission Problems in F550 behind V10

I bought a 2008 F550 V10 Automatic, 4x4, as a non-runner from an auction, so i have no idea what the symptoms were when the truck stopped moving. Truck came from a Coal Mine, with 78,000 kms. (About 47,000 Miles) Corrected the no start condition by plugging in the Crank Position Sensor, started right up, that one made me smile, although it took a while to track it down. It had vibrated loose because the AC clutch was seized and causing the belt to vibrate. Replaced the Crank sensor at the same time as the compressor, just to be sure.
Now for the next problem, indicator shows truck is in neutral, can move the gear shift lever, and it does move the arm on the side of the transmission, but indicator stays in neutral. Truck does not move, even a wiggle, in all gears, forward or reverse, no change in rpm to indicate a load on the engine. Tried in 2 High, 4 High, 4 Low, although it takes a bit to get them into each gear. Bought a gauge, and a hydraulic hose and attached to the test port. pressure comes right up to 75 PSI, same in all gears neutral and park, gauge wobbles a bit when shifting, but basically holds at 75. When you step on the gas up to full throttle, the gauge stops at 190, again some wobble, but basically holds at 190 PSI.
Codes are: Instrument Panel Code U2023, Fault Received from External Node
Powertrain Control Module P1000 On Board Diagnostic (OBD) Systems, Readiness test not Complete
My first thought is the PRNDL switch?
Could it be the transfer case?
Any direction you could point me?
 
  #2  
Old 03-14-2019, 07:03 PM
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It could be the TRS (Transmission Range Sensor) but I suspect the linkage is disconnected inside the pan.
 
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Old 03-15-2019, 05:55 PM
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Found the problem


 
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Old 03-15-2019, 05:58 PM
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What would cause this?

The photo is of the range sensor, that melted right off. What would cause it to do this? it is sitting in oil, can't get that hot, can it? Or is it an electrical short?
Thanks for pointing me in the right direction Mark.

Doug
 
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Old 03-16-2019, 08:55 AM
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Somehow it got hot. I've never seen that happen.
 
 


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