Question Stock 4x4 gear ratio

[Tacoma 4x4 Reg. Cab]

I am trying to find out what the stock ring and pinion gear ratio is on my 2007 Tacoma 4x4 regular cab with a 4 cyl. I am planning on installing a lift "OME" and am going to run 32" tires. I am currently running 245 70R-16s which is around 29.5 inches in diameter. The gears seem to be too low already with the stock tires. I am looking at 4.56s just so I can get a little more power and I do not plan on doing allot of freeway driving. Everyone I talked too already says I have 4.11s in it right now and that should be fine with 32"s but it feels like the gears are too low already with my stock tires and I could not imagine driving with 32" diameter tires with my stock ring and pinion. Besides purchasing ring and pinion sets for the front and rear differentials, is there anything else I need to know that pertains to my 2007 Tacoma regular cab 4cyl. 4x4? I want to get this done right the first time. Is this something that I can take to the dealership and have done in 3-4 hours?

-Roy

[Splicer]

You have 4.10 gears, and if it seems to be higher (numerically lower) it is because 4th gear is probably 1:1 and 5th is overdrive. I don't know the transmission ratios, but that's typical for most vehicles.

[Tacoma 4x4 Reg. Cab]

So, there should not be any issues replacing the ring & pinion gears to 4:56? I am going to purchase a Yukon Ring & Pinion set #YG T100-456 for $518.00 plus $11.00 for shipping. Anything else I might need to know before I purchase this set?

Thanks,
-Roy