Hey fellas, I have a 1990 pickup 4x4 5speed. I'm going to do a SAS soon and want to know if I need to swap my rear axle? Or just upgrade springs?

 

Your rear axles fine. Just get the springs to match the front SAS.

What are you planning for a lift/ tires?

Welcome to the forum!

 

Well its got 37's on it now with 5:29's locked front and rear I don't know much about it but I wanna convert it to a trail truck. I am just so sick of ifs I can't even go in a rut without three wheelin it! Haha I want to keep it Toyota with some good flex. I don't even know what to do on front end. I build bridges not trucks haha thanks!