sometimes the tranny dont shift like it should especially when climbing hills or trying to pass someone, i punch the the throttle it will take off for a few seconds then its like the overdrive kicks in and thats it, i cant go no faster, and even from a dead stop its sluggish then other days it takes off like rocket,i dont have a clue what it could be, any input would be nice thanks,

 

When is the last time you changed your trans fluid?

 

If it's sluggish some days and good others, sounds almost like a fueling problem.

 

x2 on the fueling problem

 

When was the most recent fuel filter change??

 

tranny fluid is good i changed it when i first bought the truck which was about 15,000miles ago , and the fuel filter i changed about 1500 miles ago ,

 

Where do you usually buy your fuel?? Did it start to do it after you filled up??

 

i used to get it where i worked which was a exxon, but we got rid of fuel all together,now i get it at place close to where i live, but a lot of truckers stop there and i dont ever hear of any problems with the diesel there. no matter if i fill up or had some for days its all the same still does whats its doing.and just about a few hours ago i went to leave got up the road about mile hit 40 mph and the truck started shaking like a roller coaster ride .

 

my truck is a P.O.S i keep finding more things wrong with it