I have a hopped up 01 with NV4500 and SB dual disk. Put 3 trans in. All habve had 5th gear upgrade and now its stuck in reverse. Has anyone put a 5600 in place of a 4500?

 

Yes its possible, i believe you must shorter rear driveshaft and make front longer, crossmember modifications, and i few other things my best friend just did that same swap so i can get more info but i am sure someone else will chime in soon