Nissan FS5W71 Transmission Shifting Problem

I have a 1999 Nissan pickup 5 speed transmission 4WD pickup truck.Question: All forward gears work, reverse doesn't work if I put it in reverse and take my foot off clutch it will not do anything.  Can you tell me what is wrong and what parts I need and also can you tell me the number for the transmission in this vehicle its a 4cylinder?Answer:  This transmission is a F5W71 Nissan 5 speed.  Based on our experience it sounds like it could be a broken shift fork or broken roll pin? You will want to take the transmission apart in order to determine  the correct parts that you need to order, as there are 3 different style 5/R forks that Nissan could have used on this vehicle.Depending upon the transmission on this transmission if it over 100k we would suggest you install a bearing overhaul kit.  You can see the other information on part that we can provide for your FS5W71 on our site.