So here is my situation... I had a co-worker help re-build my t-5, 3 or 4 months ago. After i drove my mom to work, on the way back i started hearing a clunking in the trans tunnel area. I got my bird home and took a look under her, and what do you know my TQ arm mount was hanging in two. Any ways needless to say, I do not have the top mount bolt anymore. If someone knows what size the bolts are I would greatly appreciate the info.

 

I know this dosen't help much, but it should be a 15mm if I remeber right.
This may help.
If I remeber right, the cossmember bolts are the same thread. Take one of them out and see if it fits. What I don't really remeber is if the torque arm bolt was a bit longer.
You best bet if someone dosen't know is to call a dealer or go to the parts department. Sounds stupid I know, but they do still have a lot of that stuff for cars more then 10 years old. While they may not have a bolt or you may not want to pay for it from them, they can probably tell you the thread and length.

 

W/M.T. Bolt, Axle Torq Arm Brkt Otr (M10x1.5x30).

JamesC