I don't know the brand, but there are some converters that are junk, good converters come in a pretty high price range, about $600 up.
Also when you loose a converter you need to go through the trans and get all that junk out and flush any cooling lines etc.
Originally Posted by BBCMudbogger
I have a 396 in a full size mud truck that is pretty hot. I tore up one convertor after about 3 trips out racing and got another one (same company) and I think I am having the same problem after as many runs. When the convertor is new it will flash high as advertised (about 4500) but the next few times I have it out the truck will jump when put in gear and when I smack it the tach doesnt climb as rapidly as when the convertor is new and it feels sluggish like its too tight (this is the second one and I havent been out but about 6 times this year). This convertor is making me look like an ***. I guess my question is would there be something wrong in the th400 that could be causing it? The manf says it should be good for 800 hp and I am pretty sure it doesnt have that much...maybe 650 if I'm lucky