Originally Posted by
Taz
If you set all the WOT upshift RPM parameters to 8192 RPM - the transmission won’t upshift at WOT until 8192 RPM is reached - despite input from the gear selector. Vehicle speed and RPM parameters must both be met for a WOT upshift to occur.
A 4L60 transmission should not upshift beyond the gear selected (after configuring D0913, D0914, D0918, D0919) - but it will downshift below the gear selected, if the conditions for the downshift are met.
Manual downshift maximum speed parameters may be adjusted via D0928 and D0933.
If you want to fully control the upshift and downshift via the gear selector - and have it hold that particular gear indefinitely - the only option I can think of, is a full manual shift kit - but that would eliminate all automatic functionality.
Regards,
Taz