Just finished doing a major service along with the fuel tank mod as well as Mag Hytec trans pan and rear diff cover. Very nice products i must say, almost don't want to get them dirty, he he. I have 315s on my truck and the spare is also a 315. I don't think it will fit with the diff cover. What are my options ? Spare in box, no spare ? Has anyone else made the 315 work with the Mag Hytec on a short box ? It would be sweet if it would work ! Anyone

 

it will fit underneath but you have to shift it rearward. I couldn't do it with mine because I have a reese titan class 5 receiver. I carry mine in the bed for now.

 

try this, let the air out till it is soft, squeeze it into place, secure it, air it back up maybe not to full 50psi but something that will cary you if you get a flat and keep an air pump handy, electric cig lighter type.