Why a suregrip?

GotDart, your definition of the Powertrax is wrong. It locks the axles in straight line, allowing "differentiation" in turns, when the gears overrun:

"It works something like this: During typical driving conditions, a Lock-Right–enhanced differential allows your axles to turn at different speeds (or differentiate), much like an open or limited-slip differential gear set. It’s a bit clicky-sounding during sharp, low-speed cornering (when the meshed teeth overrun each other), but this is perfectly natural. Since the unit is spring-loaded, under straightline operation (both axles turning in unison) the axles are continually locked together. That’s the key to full power transfer to the rear wheels and a solid hole shot."

Full article here:

http://www.moparmusclemagazine.com/techarticles/91299/index.html

They are expensive, but not as expensive as a new suregrip/posi/whatever and are much stronger than any of those OEM-type solutions. I have two of them installed in 8.75 rears on my cars and couldn't be happier! :thumblef: