Poor Little Cone Style

replicaracer43 said

I would still argue that while they are good units, the cone style is not torque sensing.. Those groves on the cones serve the same purpose as the groves in a syncro ring... def not "threaded" and not threaded into the case at all. The spring preload is ALL that keeps the cones pushed into the taper of the housing. There could be a small amount of force from the spider gears pushing away from each other too I guess. There are NO SPRINGS in a clutch style, but there do have two concave wave type plates in the clutch pack, to provide some preload. Most cone styles I have seen that fail, do so as a result of the cross pin wallowing out the case.

Click to expand...

Nothing mechanical will last forever. The thing about the cone is spring pressure, this being why the Auburn Pro Series is like having a Spool set up, it has far better spring pressure. Spring pressures can be changed from 200 lb's to 800 lb's so I've read, I've never personally done it yet. But I do know that there are failures in all mechanical things even the best of them and the Borg Warner Auburn Sure Grips are in fact some of the best of things. If not the Dana 60 is junk, try and pass that off:protest: The pins are in fact what usually gives out on the cone style eventually but that is due to excessive wear like a flywheel gets after 100,000 miles. There might even be a few flywheels out there that have been welded up, I can bet on it:sad9: If you think about it and picture yourself in a brand new BIG & HEAVY 1970 Super Bee with a nice powerful big block and a spin resistant cone type Dana 60 with big N 50's laying down rubber everywhere you go, you might ask yourself hmmm how long will this last before the rear explodes:burnout: