6R80 problem

[MagneticFX]

17 F150 V8 , 6R80 126k km / 78 k Mile. 10% towing up to 7000 lbs max.
No codes on transmission , trans oil (Mercon lv) / filter ( OEM ) changed twice ( 30k ,60 k miles ) . I have vibration when accelerating , they mostly disappear when I take foot off accelerate pedal, still can feel them but they are less noticeable , some jerking when on cruise control , also cruising speed city and hwy. Have some vibration when I start engine and vibration reducing when engine rpm going down but never disappear.
Also trans temperature is higher then normal + /- 190 F on hwy , up to 203 F city , when radiators fans start working.
Do you guys have any thoughts whats cause this problem?!

 

[atikovi]

u joints?

 

[hemitom]

Those temps are normal and not high My mustang with 6r80 runs at this all the time.
like atikovi thinks more like u-joints.

 

[fsdork]

Google "F-150 slip yoke" and see if the described symptoms track with what you're observing.

As for temp - when I'm towing, the 6R80 in my F-150 runs in the range you're experiencing. I don't watch it as closely when city driving, so I can't offer a comparison there.

 

[bullwinkle]

Does it sound like driving on rumble strips when you go uphill, in top gear, & the converter's locked? That's what my '15 Transit did when the TC failed.

 

[BISCUT]

I have the same trans in my 15 with similar mileage. I've read everything I could on it and the posts above are often cited for the symptoms you've posted. Let us know what you find out. Good luck.

 

[MSCH]

17 F150 V8 , 6R80 126k km / 78 k Mile. 10% towing up to 7000 lbs max.
No codes on transmission , trans oil (Mercon lv) / filter ( OEM ) changed twice ( 30k ,60 k miles ) . I have vibration when accelerating , they mostly disappear when I take foot off accelerate pedal, still can feel them but they are less noticeable , some jerking when on cruise control , also cruising speed city and hwy. Have some vibration when I start engine and vibration reducing when engine rpm going down but never disappear.
Also trans temperature is higher then normal + /- 190 F on hwy , up to 203 F city , when radiators fans start working.
Do you guys have any thoughts whats cause this problem?!

torque converter, tork converter clutch issue?

 

[MagneticFX]

Does it sound like driving on rumble strips when you go uphill, in top gear, & the converter's locked? That's what my '15 Transit did when the TC failed.

no sound or noises

 

[ripcord]

I can only guess about your vibration, so no help there, but I do know the 6r80 has a thermostatically controlled valve that prevents fluid to flow to the cooler until the fluid reaches 190f. Your temps are completely normal.