i have an 1984 Toyota truck and im looking to put transfercase gears in it. im pretty sure i have an RF1A transfercase. when i was shopping for the gears they come in 21 spline or 23 spline. how do i know what spline count i need? any ideas? thanks

 

bunch of t-case information starts about half way down the page http://trail-gear.com/creepercase.html

 

you need 21 spline unless you have an R151F Transmission out of a turbo truck or someone has converted it to a 23 spline output

http://www.4x4wire.com/toyota/faq/

welcome to YT--this information would have been easily found with a little effort on