"Tera Low" Saturn OD??

As if there haven't been enough OD questions this week...

So I was browsing the AA site today and I come across this:

https://eshop.advanceadapters.com/c...710F27186?product_id=2433&czuid=1172676014045

If I'm reading this right, that is a 3.15:1 underdrive?!?! Is that even possible? I'm wondering if they mean they've developed something that brings the D18 low range down to 3.15:1. Otherwise, that would be almost 8:1 reduction in low range! It is definitely for their Saturn product because I see a separate listing for a bowl gear if needed. Kinda spendy, but would be on the cheap compared to a trans swap if you factor in adapters, driveshafts, etc. (If you already had an OD installed).

 

It brings your low range to 3.15to1

 

What MB82 said. That's a kit that also allows use of a Saturn or Warn overdrive when switching to the 3.15 low range. It requires a special input gear for the overdrive. I've installed a couple of these in 18's. Work quite well. Nickmil

 

Thanks guys. That makes a lot more sense now.