Talked to my tuner today he said a converter doesnt need tuning because the car was tuned by the shift points.

Please help me What should I tell him To do what do I tell him to change I will take a video today I will post it here I want to show you how the third gear is stupid.

 

the vig 3600? might want to move the TCC lock up speeds up a bit but converter tuning is kind of a touchy feely thing best done on the street with the tuner. What about 3rd isn't good? 3rd. in the 4l60e sucks normally.

 

You will need to bump up the speed at which the converter locks, and should play around with the tps% it locks and unlocks. And change the pwm lock up min and max % to 90%-100% so the converter locks up firmer.

 

I will go take a video after few hours it will be online

 

How is the idle, does the truck stumble/surge when coming to a stop, have you hit the rev limiter while shifting?

 

The truck Idles normal and the stop thing is normal and yes I hit the rev limiter while shifting except for third gear it reaches till 5000 rpm at 170kph then it returns to 4500 rpm after that I gain the power again and the speedo reaches 200 kph and the rpm keeps moving down fast but I didnt make it hit the 6000 rpm because radar was ahead

 

What I would like to see, instead of feeling it. is see where everyone else has theirs set, so I know I'm adjusting the right stuff and not going so far over that I break it.

 

Here is the video please tell me what to tell him to do I havent go to him yet but Talked to him on the phone.

 

Here is the video please tell me what to tell him to do I havent go to him yet but Talked to him on the phone.

 

Thats the TCC locking at 170 kph.

Your WOT upshifts result in:
1-2 4400 rpm,
2-3 4450 rpm,
then your TCC locks at 170kph bringing your revs way down to 4000 rpm, way out of your powerband. Couple the fact that you are down out of your powerband with the fact that you have lost all torque multiplication with a locked TCC is the reason why your WOT 3rd gear accleration is dead.

Get the TCC apply speed disabled or raised

OR

Apply the TCC at WOT in mid 2nd gear where the gearing advantage allows your engine to power thru the TCC apply. But with your 3600 rpm stall TC, torque multiplication thru the shifts will be negated

You tuner needs to adjust the WOT TCC apply speed tables. In your case, ALL WOT TCC lockup disabled would yield the best acceleration. With my stock stall, I dropped 1 tenth in teh 1/4 mile by disabling TCC lockup 100%. Your high 3600 rpm stall converter will yield more gains.


It sounds as though your truck would also benefit from some gearing changes.

In summation, "Tell your tuner to set all WOT TCC lockup to 400kph"

peace
Hog