The answer to that question depends on what is broken and on your level of ability.
Assuming it's a Mazdog M5OD tranny (you didn't say), it's easy to get the top cover off the tower and see what's wrong. If it's just the shifter then fixing/replacing it is easy. If the problem is with the forks/rails it's way more complicated.
1996 F-150 XLT, reg. cab 6.5' box, 4.9 I6. E4OD w/ B&M alum sump, auxiliary cooler and external filter, Addco 1" sway-bars F&R, Bilstein shocks, 16 x 8 AR Bajas w/255/70-16s, Line-X spray in liner, hinged tonneau, Reese hitch and electric brake controller, VDO tranny and engine oil temp gages, stainless pushbar, Hella 550 fog and driving lights, Hella backup/work lights, 3.73 Trac-Lok w/ an alum. diff. cover with cap support screws, PFC "Z" brake pads, high flow cat with a 2.5" cat back with a FM 70 muffler.
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