Shudder

[DanCan0508]

have a 2018 platinum max with 55K miles. Anyone had significant shudder 30-45 mph? Have driven ecoboost and just had explorer torque converter rebuilt, but expedition will start to trans shudder 30-45 mph. Anyone have this issue or fix?

 

[Team_Z]

When was the last time you changed your plugs? Old plugs or plugs gapped incorrectly can cause what feels like a trans shudder.

 

[bill_b]

When it does it what are your RPMs? Mine has been doing this a fair amount lately since I had my ECU reflashed by Ford, my expedition will drop down to 1200rpms and it starts to do it.

 

[DanCan0508]

When it does it what are your RPMs? Mine has been doing this a fair amount lately since I had my ECU reflashed by Ford, my expedition will drop down to 1200rpms and it starts to do it

Lower RPM, 6-8 gear. Have to give it more to get Rpm back up and more boost.

 

[bill_b]

Was your PCM recently reprogrammed for the cam phaser issue and you're just noticing this recently?

 

[99WhiteC5Coupe]

have a 2018 platinum max with 55K miles. Anyone had significant shudder 30-45 mph? Have driven ecoboost and just had explorer torque converter rebuilt, but expedition will start to trans shudder 30-45 mph. Anyone have this issue or fix?

Your 5-year / 60,000 miles (no deductible) power train warranty should still be in effect. Take the vehicle to the dealer for diagnosis and repair.

 

[bill_b]

Ford 3.5 EcoBoost Cold Start Rattle (VCT Phasers) | Everything You Need To Know

Ford’s 3.5 EcoBoost has become well known for vct phaser issues. Vct Phaser cold start rattle is the number 1 issue with these engines. In this video I break...

youtu.be

4:20ish

 

[bill_b]

21B10 was done to my expedition a few months ago prior to the vct phasers being replace. I guess Ford thought they could fix a mechanical defect with a PCM reflash lol. Not only did they not fix it but mine now shudders exactly as you described.

 

[Soliyou]

21B10 was done to my expedition a few months ago prior to the vct phasers being replace. I guess Ford thought they could fix a mechanical defect with a PCM reflash lol. Not only did they not fix it but mine now shudders exactly as you described.

The original 21B10, released in May, caused transmission shudder and they stopped it. Then they brought it back in July with an updated version that should not cause the shudder.

I would say if you had it done before July, then ask the dealer to re-flash your ECU with the most recent one.