When cruising on the highway buzzing 60mph @ 1600-1700 rpms shouldent the tranny downshift when I stomp on it to pass someone ?

 

I would say that it should. Mine will downshift at 70mph. But any faster than that it will hold it in o/d.

 

Mine will & yours should.

 

yeah, then something is wrong. sometimes I can feel the ---correct me if Im wrong--- TV cable or shift cable going to the tranny kinda hung up. I can depress the pedal all the way and it seems to break it loose. Dosent do it all the time but when its hung up it shifts at high rpms untill I smash the pedal and break it loose again. almost like the cable is binding ??

 

i try to keep it in overdrive to pass someone. I have plenty of power in OD though to pass people. if i really need to get up and go i will let it downshift and then it will slip before it hits OD.

 

Aren't these "fly by wire" fuel injection.Meaning it's electronic, not cable?

 

I dont know ? I know that theres something hanging up and it affect the shift points. I can feel it in the pedal .

 

What year of truck is yours?

 

Yeah what year is it? My '04 at work does the same thing. Sometimes while accelerating gradually it will rev high in first gear and almost feels like the gas pedal is stuck in one position until you goose it a little to get it to go down further and then the tranny shifts. I agree with you it feels like a linkage sticking. From what I understand 05 and up are electronic throttles but prior to that they have a cable. I can definately feel more vibration thru the pedal on the 04 and feel nothing on my 06

 

2003.5 48re goose ---- exactly bighornram,, and sometimes it goes thru the the shift pattern correctly , at least the way I think it should shift, it will go into fourth at around 42 mph when it shift correctly