31 spline

My current ranger is a 2008 fx4 with the 4.0 V6, 5-speed manual, and 4 wheel drive (this combination supposedly didn't exist this year but from tracking the vin and previous owners it used to be a fleet truck up in canada). The rear axle code is R8 which from reading other forums is the much...

Hey guys and gals! First, thanks to everyone for posting so much valuable information. I'm working on a buddy's truck (a cherry 2003 FX4 LII with 102k, manual gearbox + stick transfer case selector) and I've gleaned some pretty valuable information here. Awesome forum! Anyways, he called and...

Does anyone know whether an R8 axle code from a 2008 Ranger is for sure 31-spline? There is one for sale on ebay but I don't want to pay for shipping if it's a regular 28-spline 8.8". Thanks everyone!