HDJdreams
SILVER Star
It is suited to highway driving but it needs extra capacity to make it run cooler. As it is there is only about 1/2 quart of gear oil and there really needs about 3-4 quarts to keep it cool. Like I said in an earlier post my dad's black box made it over 2000 highway miles in just a few days on the 1/2 quart and it didn't grenade, it got hot but didn't fail. With the extra fluid capacity added there shouldn't be a problem. Add a reservoir, pump, and a finned cooler and the highway problem is solved.
Did the Blackbox have ports for the cooling lines? (Or did you have to drill and tap?) Does it have an internal pump? If not what did you use for a pump?