Icecoldsteve

Let me start by saying I have just registered to this site finally , after using it for years , Thanks for all your help , now more issues.....


My 04 f150 4.6l with 74k miles on it has had done so far:
rebuilt differential at approximately 35k
rebuilt transmission 1 year warranty at around 38k
refurbished transmission at 72k
new air intake manifold at 72k
new plugs , coils , fuel filter at 73k after major power loss and shaking like crazy , now at 74k when I start to pull away from a stop it shakes like 3 light jumps , than feels normal , than it feels like 1st gear is slipping , now its doing it between 3 gear and drive , at least it feels like it .
I have no idea and could use some help , btw I am a carpenter , not a mechanic so any help would be greatly appreciated.

screamineagle

Holy crap! 2 transmissions in 74k? That's some serious bad luck bro. I would look into replacing your plugs and COP's for the bucking.

Icecoldsteve

replaced within the last 1k plugs , coils , and fuel filter

screamineagle

Did you replace boots and springs when you replaced the coils?

joe mcmillan

If you havn't replaced the FPDM, time to take a look. Drop your spare tire and look up at the frame. The FPDM has an aluminum housing that usually is attacked by electrolysis. Held on with 2 bolts and a clip in wire harness. If the aluminum is corroded replace it. Amazon has them by Dorman for $58.

Sounds like your luck is not so great.
My 2004 4.6L 4X4 is at 73,000 miles with only standard maintenance so far.
A great truck.

Hollabakzach23

This! When mine went it was raining outside and rain water kicked up into it and shorted it out leaving me to call a tow truck and getting a ride home. Only major thing I've had to do to mine in the year I've owned it!

60DRB

...take the FPDM off and actually look at where the unit touches the frame itself.