Iv'e been struggling with taking out the thrust bearing in my motor, and am looking at all possibilities.
What might be happening is that there is to much trans fluid line pressure pushing the torque converter in to the flex plate, and in turn the pressure pushes the crank hard in to the bearing, wiping it out.
This includes fixing up some trans cooler lines that were cut, and returning them to factory. There was a couple of tight L connectors that might have been restricting flow. I also have a new torque converter with a billet front cover on it to take the possibility of ballooning out of the picture.
This led me down a road also as to the need to check trans line pressure. I obviously can't do this until the motor is back in, but I still want to see if I can reduce the pressure using tuning. Decipha wrote this article (Thanks Decipha!)
Transmission / EFIDynoTuning and it specifically talks about trans line pressure being affected by the torque table.
Here's a quote from Decipha that made me take a second look:
"Dynamic TV pressure is calculated by engine torque, the ecu uses the current airmass from the
MAF Sensor to calculate engine torque. That value is compared to the engine
torque table FN1615A - Engine Torque Table, which is scaled by Load and RPM, if the actual torque is less than this table then you get excess pressure,
If the actual torque is greater than this table then you get less pressure.
This table must be manually dialed in by the tuner. "
Now, Decipha does not tune SCT, but the ecm still has the same programming, no matter what method you use to tune it. This made me look in my current tune in the SCT Pro Racer Package. There are some area's I had not really looked at, and had purchased a tune from Don Lasota to see if he could help me with some issues.
Here's the description of the Torque Table in the SCT software:
The following are 3 screen shots of the factory torque table, what Don Lasota has mine set to, and the 3rd is the torque table I am thinking of starting with when the motor goes back in.
Factory
Don Lasota Settings
My "Best Guess" wild arsed guess settings:
@4pointslow is willing to put the effort in to helping me with this and let me know with some fact (Rather than my guessing) if I'm on the right track, or lost in some field. There is really no way to completely understand some of this stuff as a pure hobbyist. Taking out these thrust bearings is getting really expensive, so its worth looking at everything.