Ok here's my problem, when I'm driving down the road and I go to give my truck some gas it wants to start jerking and will even sort of backfire. It seems to want to do this between 45 and 55 when I've done got into overdrive and my rpms have dropped down. As long as my rpms are up seems like 2000 or more it won't do this, but if its below that and I give it some gas it feels like to me my tranny is gonna fall out. Can any one help?

 

luggin. In converter lock. Do this, tap the brake lightly and then give it gas, does it feel better? Could be timing at those rpm/load cells.

 

Ok I'll try that when I leave work today. So if it's luggin as you put it, how do you fix that? If it's timing I guess I just need a new tune.

 

You can adjust the torque converter lockup clutch settings in the tune

 

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I've never understood the lockup of a convertor so help explain it to me. From what I have gathered the convertor locks up at a certain mph, correct? If thats true does it mean mine is set too low or high?

 

converter locks at a set speed/throttle position. Your may be set too low or timing off in those load cells. It's something that takes a little finess to work out, many people experience this (if it is your issue?) after a first tune. This is where dyno tuning on a load bearing dyno comes in real handy too

 

Ok well thanks for the help guys! I'll get a retune and see if I can get this worked out.

 

Different guys chose different lockup settings depending on their driving habits, and often the speed limits on the roads that they frequent. If you constantly drive right at the speed where your converter locks up, you will find yourself with your lockup clutch constantly locking and unlocking. Question for the tuning gurus out there, I know that throttle angle comes into play with the TCC locking and unlocking, so I'm guessing that it's possible to tune it so you need less throttle angle to unlock the TCC, so the engine doesn't bog down under moderate acceleration?

 

yes, raise the unlock speed for a given TPS.