i don't own a Washburn Taurus T-25 5-string bass... hear they are awesome basses. I can only speculate on whether it would work or not... You did say the tuner broke, right? What part: the knob, the tuner gear, etc? Maybe you can post some pictures and someone can give you more concrete advice... yeah, i know i know... why post pictures?!? you may ask, it is easier for people to give answer or solution if they see the actual problem.
Use photobucket and copy then paste link to image.
Hope you were able to fix the tuner. Man it is a long time to get reply.