I have a 6r140 of a friend that is not downshifting very easily. it is an engine trans swap from a van to an older truck. we have updated the transmission with a stock 22 turck file. engine is stock 7.3.
our problem is if he's in a higher gear cruising, like 4th at 1500 RPM and goes WOT, it runs in 4th all the way until 3200 RPM then it downshifts. we have put in the base and sport shift schedule. with same results.
MAF is tuned in good.
we do hit a MAF saturation limiter past 5300 rpm, but we backed the RPM down to 5200 and it doesn't hit that anymore, looks like the limits need raised on the MAF as its hitting the max and won't read any hire.

any ideas where to look next would appreciate it.