2007 growl under light accel

Hey All:

2007 Toyota TRD crew cab 4x4.

Doing over 60km/h under light acceleration the truck kinda growls, as if the torque converter is locked up, and won't release. If i move the transmission selector to '4' the truck drops the gear, and everything is good. But of course it won't go back into OD until i move the selector back.

Is this a common thing? Is there an easy fix, can anyone give me an idea as to what the issue is.

Thanks in Advance

 

Nobody has run into this before?

 

Do u by chance have a CAI? some seem to be slightly narrower than stick intake cause to run rich and screwing up shifts

 

The growling really isn't the concern. It's the fact that when i press the gas pedal, the truck doesn't really accelerate unless i push it way down where it does a harsh downshift likely to 3rd. It's like it's bogging down, and not dropping to the gear it should for light accel... No CAI...

 

Still nothing eh... i'm hoping it's just a sensor or something, but I don't know enough about toyotas

 

the auto doesnt seem to kick down as well as some other vehicles and it can bog itself down IMHO.

I have noticed that the URD MAF calibrator leaning things a little has helped....when at partial throttle, sometimes I would get on the gas for a merging or avoidance manuever and the truck wouldnt kick down like i would expect, and just lug/bog itself down like a manual trans in 6th gear doing 30mph.

Maybe its placebo, but I dont notice the truck doing this anymore after the calibrator.....these trucks run rich and it shows.

 

Interesting, is there a trick to calibrating the MAF. Or do you need a special URD computer tool or something to do it? Hmmm, so sounds common, just forces you to push that throttle a bit more... I don't necessarily like it, lol.

 

May not be ur issue, but id get the trans fluid flushed or atleast a drain/fill.

As for the urd, gadget can preinstall a map for you......do a search tho, its not just plug and play.......unless a certain someone perfected his custom pnp kit