No, you cant as far as I understand fit the prado locker on the standard gears....thats why there is the difference with the gear sets 3.7 and below and the ones 3.9 and above.
Going by my calculations, and please correct me if i worked it out wrong anybody, but going by what you said, if you had 33's and the 4.5:1 gears in 5th gear at 100kph, you'd be doing 2,600rpm.
yes, you would be revving higher, but that is because you would have much more useable torque down lower than before.
does that make sense?
I just worked mine out for a "F" around......currently with the 4 speed auto D4D, I can get her to go into lock up converter at 80kph if on a smooth flat road with no wind or load and revving at 1400rpm. Thats where peak torque starts.
if I changed to 4.5 gears, it would mean at 80kph I'd be revving at 1689rpm....still sweet and low. So at 100kph I'd be revving at 2,111revs.
And she'd be shifting into lock up converter at 67kph......very nice for cruising around and not that bad on the highway either....I'd be at peak torque at 100kph considering the D4D makes maximum torque from 1400 right through to 3,400rpm.
She'd be pulling like a 14 year old school boy