Chris07

Hello I am looking for some opinions on a problem that I have had with my truck for last couple of weeks.
The truck is an 07 F150 5.4 2WD with 151k.
Around 145k I replaced timing chain, cam phasers, tensioners, guides, etc... radiator, clutch fan, oil pump, water pump.
Around 120k I replaced ignition coils an spark plugs.
Truck ran great until about 2 weeks ago, runs like I am pulling a heavy load. Rpms jump to 3.5-5K before shifting an general driving they seem to stay in the 2k. I checked transmission fluid which is still a clean red with no burnt smell and at correct level. I was hoping I could get some input or find someone with similar problem before having to pay an arm an leg for shop to diagnose problem.

white89gt

When you say that the "Rpms jump to 3.5-5K before shifting", I assume you mean it does this in a neutral-like condition.... in other words like the transmission is slipping?

Chris07

It’s while accelerating, but when it does shift it’s still fairly smooth no jolting or anything just takes longer an higher rpms than it used to.

dukedkt442

So its shifting later than it should? Have you ever replaced the fluid/filter in the trans? I'd start there.

Chris07

It goes in on Monday for flush an new filter. I just got the street clean from the timing chain job an hear this is a messy project, hopefully that’s the problem. truck is becoming a hobby with all the crap I am having to replace.

dukedkt442

With your mileage and a flush, it'll probably continue to be a hobby...

Chris07

fixed truck, transmission did need service along with differential but the power loss was from a plugged catalytic converter.