i have a 2002 F-150 4.6L Regency i bought it with 10,000 mi it was pretty much stock except for the exhaust that regency put on it, but now it has 45,000 miles, but ever once and awhile when i would be driving and then slow down then speed back up it was like my tranny couldnt catch up or something and it would shift weird, i thought it was because i had 20in rims,but latley its been doing it more often,any suggestions? thanks.

 

could it be your transmission catching to the speed of your engine?

 

idk? its weird, do you think a flush would make it stop or should i have my tranny looked at by a mechanic?

 

i also have another question that i seem to cant find an answer to, when im open throttle on my last shift i hear this loud screech comming from my truck, anyone know what that could possibly be, any help would be appreciated. thanks!