Been running into a problem dynoing my automatic car, it keeps wanting to drop from 4th to the very top of 2nd gear 8/10 times. Is there a way to prevent the automatic transmission from down shifting? Is there perhaps a solenoid I can unplug that is in charge of downshifts?

Its for an automatic 1jz.

 

put it in '2' ??

 

Still seems to downshift

 

HY!

Maybe to disconnect the "kickdown switch" on the pedal?