On Thu, 14 Dec 2006, Marty Bricker wrote: > Is the 258 internally or externally balanced? Thanks. The AMC Six is internally balanced; the flex plate has no weights unless it was mistakenly taken froma V8 donor car (in which case you simply knock offf the weights). Even if unbalanced, with the mass of the torque converter attached, I would be very skeptical if it could shake apart a 904/998/999 Torqueflite! Dubious! Dubious! The 904 family is a FINE, SOLID, RELIABLE, NO-BRAINER transmission. There's nothing weird or delicate about it. They rebuild fine and run forever assuming you don't abuse it, keep it cool and full of fluid. Should run for 150K+ per rebuild, and just get leaky and maybe slippy with extreme old age, not do anything stupid like break. The most common assembly problem is not engaging all three splined/slotted shafts in the torque converter, in which case it will leak in short order. But that's an amateur's problem, not a pro rebuilder issue. Sounds like an incompetant rebuilder, unfortunately. _______________________________________________ AMC-List mailing list AMC-List@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list or go to http://www.amc-list.com