I wonder how they came up with the non-synthetic requirement
I've known synthetic oils to transfer heat significantly better than conventional oils as thermal conductivity typically scales inversely to particle size in heat transfer media
I'd love to chat about a custom front half. The tera kit's main pitfall IMO is the small orbit radius of the planetary gears.
my email is [email protected] or if you have a preferred way to connect that's fine too
I recently rebuilt a Tera low 4:1 np231 kit, including machining new helical gears, rebuilding the planetary cage upgrading bushings to needle bearings, etc. The end product is essentially a brand new tera low kit minus the minimal wear items like the inner gear and input shaft.
My question is...
SYE is an easy install, my $0.02 cents is pick up that sale on the AA SYE for $220, do the install yourself!
id be happy to chat on the phone if you need help w the install and there's also some good documentation posts here
is anything wrong with your current 231? the advance adapters SYE kit is on sale at quadratec for only $220 right now
https://www.quadratec.com/products/52237_99_07.htm
keep in mind you need a new rear driveshaft for this conversion.
Are you actually sure you need the TC drop with only a 2.5in...
a nice limited slip is typically much better for slick conditions such as snow/ice and even sand. still decent in rocks from my experience as well
https://www.powertrax.com/product-info/powertrax-grip-pro-traction-system/
but FWIW I have friends with lunchbox lockers up front and they don't...