Questions about an automatic gearbox

[h00t_h00t]

I read on the intrawebz it's not recommended to rev the engine above 3,000 rpm in my Camry...

Thats a load of arse to be honest, if you rev the engine more you'll go faster and use more fuel. If it was going to do damage to the engine/transmission at over 3000rpm then that is where the rev limiter would be.