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Delayed shift, Hard engagements and slip.

 
  #1  
Old 01-21-2019, 09:16 PM
Ketch87
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Delayed shift, Hard engagements and slip.

This is just a quick post of a solution to my issue. I have an early 04 F250. Built April of 04. Has the old style HPOP however every other component of the vehicle is 04 parts. Anyway I was getting to described above symptoms and this is what I did... I drained and refilled the trans oil(Mercon SP), replaced both trans filters, replaced brake switch, FPR(Due to a leak) and test all transmission solenoids for proper resistance. All solenoids checked out with perfect OMS. Last I tested the FICM-low voltage. I wasnít sure what was causing the issue still... no sign of the torque converter going bad. Fluid in the pan and filters looked, smelled and felt great. I knew the FICM had connection to the transmission but I could not find the details I was looking for. I was getting sluggish throttle response and due to the low voltage already found I bit the $659 and replaced it. As soon as I did I had no more delayed shifts , hard engagements into reverse and drive or any slipping as I drove. Not saying this will fix any of the listed symptoms because I donít fully understand the connection Bettye FICM and Transmission but it cured mine. Hope this helps someone out there that is trying to diagnose.
 
  #2  
Old 01-22-2019, 12:08 AM
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When the FICM isn't operating correctly, power levels suffer. When you don't have enough torque, the transmission sees that as an issue and prevents the truck from shifting into the next gear.

FICM's never die on their own accord, however. Commonly, their demise is caused by weak batteries or a weak alternator. I'd strongly suggest having these items bench tested to ensure their proper and sufficient operation. More information can be seen at:
1. Watch those batteries & grounds! and at
2. Get a better alternator.

Hope this helps!
 
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  #3  
Old 01-22-2019, 06:50 AM
Ketch87
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Very true on the batteries and alternator. I had a weak battery awhile back as well as an alternator. I fixed those about 8 months ago. No issues with either sense then. It could have caused and issue with the FICM then...
 
 


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