Ford truck are in need of help..

Well my tranny finally went out and replaced it with a knew ford
tranny with 3 years 100,000 mile warranty. It still has a miss fire
and has popping in the rear end. Had a shop look at it and they said
the gears in the rear end has exteme wear on it, but could last alot
long with care. Just will hear whining noise. As far as the miss fire
no one can find it because the computer will not pick it up. I asked
why and they said that it has to do it alot of time in a row. It does
it alot but on occasion so their for will not pick it up. SO how do I
fix it..

Did you take the truck to an independent mechanical prior to purchase
and get the prepurchase inspection?

Randy,
While this is feedback FORD needs to hear I think you also need to
direct your letter to the Nissan Dealer that sold you the previously
owned vehicle.
As far as MPG the Chart infers that this vehicle should get 12 city
and 16 on the open road.
Stop back when you hear back.
BillR.

The only good news is that the F150 was the best selling vehicle for
23 years, and is the best selling truck for 31 years running.

Therefore, if you have no warranty, at least you will be able to find
parts and find someone to work on it (if you don't). It sounds like
you bought a stinker, but since it is used there is probably nothing
Ford will do.