99 F150 4X4 driving at highway speeds transmission in OD if I let of gas and ease back in it seems like it drop out of OD for second or gears down 1 gear then goes right back in OD

 

How many miles?

I assume you change the trans fluid every 30K. 15 K if you tow

 

Sounds like the torque convertor unlocking and locking back up. That is normal depending upon how much gas you give it. The more gas, the more likely it will unlock.

 

I agree.

I hope that agreeing with someone doesn't get me in toruble this time though. LOL

Darrin

 

i have a similar problem with my 2000, 5.4 liter, when im driving down the road and in overdrive, if i let off the gas and coast down to where it will shift, it feels like i have applied the brake, and when i press on the gas, it kind of jerks back into OD, i have 121,000 miles on it and transmission fluid is fine