GMC/ Chevy automatic transmission question

[Nismorphed]

On the automatics you can shift to manual mode. If you are in the manual mode does it still restrict unsafe gear changes? For example driving 80-90 and attempting to shift down to second gear? Would it allow that or prevent the unsafe downshift?

[speedog]

Won't allow it or at least my Chevy won't.

[Twin_Cam_Turbo]

It should not allow it.

[Masked Bandit]

I don't think it will. Keeps the stupid out of the equation.

[Rat Fink]

.

[syritis]

i've done it in my colorado. from 80km into 2nd. haven't dared try first gear.

[BerserkerCatSplat]

Unmodified valve bodies should work like Rat Fink described. A shift kitted VB with semi-manual or full-manual shift will allow you to downshift regardless of speed. I modified mine for semi-manual - I downshifted to first going ~30 and it engine braked hard enough to chirp my tires. Haven't done that again!

[Nismorphed]

Thanks for all the info guys ive always wondered about this.