I have a 2003 f250 5.4 auto...This problem only happens when it sits overnight and i start it in the morning...when i start it the truck actually jumps forward like it wants to go but only for a second....

any ideas?

 

I used to own a 2000 SD 4x4 5.4 auto, that did the same thing. It would only move a little. But it was enough to make me think "whoa what the hells going on". My truck only did it when it was really cold outside, and the trans was extremely cold, and parked on a flat surface.

 

Make sure clutch is all the way to the floor

 

Same thing...ever figure it out

 

Re read the post. It is an automatic.

 

mine hasnt done that yet....now I will have to watch out for this

 

I owned my '01 for 10 years and it did the same thing. I think you'll find it's a common phenomenon and of no concern.

 

Nope. Just learned to live with it. It never did it in my driveway on cold days. My driveway is on an incline though. I got thinking maybe when I parked at work, on the flat, maybe the park pin in the transmission wasnt engaging (if the 4r100s even have a park pin in them). And when I would start it after work, it would roll forward on start-up, until the pin caught. I don't know thats just what I was thinking. I'm probably wrong. I have an 03 now with 128'000 on the odemeter and it hasnt done it yet. My 2000 had over 170,000 when it started doing it.

 

Mine does it every time I start it. Evidently, one of the forward clutches in the trans is engaged with no pressure and as soon as the engine starts to spin it disengages. I wouldn't worry about it.


RON

 

Does it still lurch as much when the parking brake is used (as it should be whenever parking anywhere, not just inclines)?

 

i did see that occur once with my dad's '94 3/4 ton. the trans linkage on the coulmn under the dash had gotton loose, right where the cable attaches to the bellcrank. (lot of fwd/rev shifting, snowplow useage) and even though the seletor ws in park, the trans was really in reverse. glad i never jumpered it across the solenoid under the hood to start it. a little loctite and things tightened up, it never happened again.

 

Happens all the time with all kinds of trucks and cars, no worries.

 

I only notice it when I use my remote start in really cold weather but I have a habit of putting my foot on the brake before I start it manually.
I wouldn't worry about it seems like a lot if them do it.

Rob

 

I think its the engine cooling fan pulling the truck forward on start up

 

You should always set your E-brake before putting it in park, it will reduce the load on the parking pawl in your transmission. Definitely on grades, but I set mine on flat terrain as well, just make a habit of it. Neutral -> set E-brake -> Park, every time. The only exception to this is in very cold temps on flat ground, then I sometimes don't use the E-brake so there is no concern of it being frozen in place next time I go to drive.