I used that stuff with disastrous results.Long story short.Modulating valve (think thats what it was called)on a 350 turbo tranny--the bolt that mounted it broke.Instead of fixing it right I jb welded it.I followed all directions to a T,and gave it more than enough time to set up.On the test drive,I took it easy--all was well.Then I floored it.The car hit the passing gear, a second later engine was taching out,but the tranny was doing nothing.I pull over and look under the car.Valve was hanging under the car by a vacuum line,detached from tranny,I had lost ALL my fluid,and burned up the tranny I had just installed.I got 12 miles out of it.First and last experience with jb weld.