3rd gen 4Runner Radiator - 2wd vs 4wd

invalid@example.com (tx_shooter), tx_shooter
Wed, 26 Sep 2018 19:30:27 +0000
Mechanical

So I was getting ready to pull the trigger on a new radiator and I found where someone posted that there is a difference between 2wd and 4wd radiators. I did more digging and found that there are two different part numbers for the radiators. I put my VIN into one of the Toyota Parts websites and it brought up the $300 radiator as an auto/ 4x4 specific part. So my question is - why? What is the difference?

The price is pretty steep. The 2wd is $120 vs the 4wd for $340. I am still trying to...