03 powerstroke automatic?????

[stroker03]

what auto tranny does my truck have i think its susposed to have a 4 speed but it feels like the overdrive off has two different sides to it?

when i hit the od off button it down shifts and then it feels like it shifts in to a different gear. but i know its not the second gear.

[payne5757]

You are probably feeling the difference between your converter being locked and unlocked.

[stroker03]

ok then but is that bad?

and also when i mash it at i speeds it up shifts and down shifts constantly what does this mean?

thanks for any help
stroker03

[payne5757]

The constant up and downshifting if this is truely it sounds bad. As for the converter locking up, it is perfectly normal especially when downshifting. The way to tell if the converter is locked up is the tach will lock in position whether or not your are giving it gas. When the converter isnt locked up, it acts like a rubber band(only example I can think of guys.) It allows the motor to rev up without directly locking it to the tranny, kinda like letting the clutch slip in a manual tranny. When the converter locks up, its just like a manual tranny being in gear, in that its a solid connection between the motor and tires.

[stroker03]

its only at 90 and only if i put it all the way to the ground.

do you think its a lack of power and speed or a bad tranny. its an 03 with 25,000 on it.

[payne5757]

This sounds odd if its really shifting like this. Are u sure its not the governor kicking in? Someone probably needs to ride in the truck to further diagnose whats goin on.

[stroker03]

do you know what tranny it is?

[Jon]

5 speed overdrive

[stroker03]

Originally Posted by Stroketechintraining

5 speed overdrive

so do you think its weird that it up shifts and down shifts at 90 constantly???
or do you think its a lack of power?

[House22]

if its a 7.3 its a 4r100 the 6.0 had the 5r100
sounds like TC is going, how many miles on it, any fluid changes?