U are right in that putting hold maintains a lower gear, but
till which gear, that depends on which gear mode u are in as i have
clarified earlier on...
I have got 2 cars at home, one with a hold and the other with
overdrive... both works exactly the same..
For overdrive, normally when u are driving, overdrive is on,
allowing to engage the maximum gear...
For hold, when normal driving, the hold is off to allow u to engage
the maximum gear...
To downshift 1 gear when in max gear or allow the gearbox to shift
up only to its 2nd max gear, u turn off overdrive (equivalent to
turning on the hold button)... To look at it another way, when the
word (hold or overdrive) is lighted on the dashboard, it means that
u will be able to engage into yuor max gear...