Originally Posted by capetaco12
With a lunchbox When the ADD disconnects on the front end your driver side CVshaft will still spin thus your front driveshaft as well. (Jeeps and other vehicles have a spinning front Driveshaft from the factory doesn't cause any major wear) This extra spinning could result in a bit more wear like Ujoints wearing faster and guts in your diff. Offroad with 4WD engaged it will put extra strain on the front end with twice the traction being applied. However so will an ARB when engaged. In my experience anytime the extra traction resulted in a CV going boom I would have had an ARB Locked anyway.
Now where the Lunchboxes are not so great is the rear. The front has the Disconnect so the locker isn't ratcheting or being worn during daily driving. When you have it always under load and being ratcheted the locker will wear. Generally speaking the locker itself is the piece that takes all the force of the "unloading" why you hear the clicking or ratcheting. After a few years of street use the Pins on the inside of a street driven locker will need to be replaced.
Ok, this makes more sense... Like I was saying, I know a few peeps running them. One guy I know very well built an 84 Silverado from the ground up, invested big money but went with a Detroit in the rear. I know it was noisy, but he never had issues, put a good amount of miles on the truck. He ended up selling it, but maybe that happened before the locker was ready to give out from wear ?
I would think an installation in the front, and maybe manual hubs would allow it to last a pretty long time ?
Appreciate the explanations, like I said, just trying to understand better.