Roachy with out wanting to get flamed i have seen/ driven a few different WG's with Quadra Drive and they Don't always Lock.... I agree that QD is great but i would Not personaly put it on the same level as a Locked Diff.. I have been in a bogged WG QD and it was crossed up and Not getting any power to the wheel with traction..
If a Locker of any sort Air or Cabel was fitted it would of got the Grand out of this particular bog..
Just my 0.02c
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ONE DAY ILL MAKE THE VOICES ALL GO AWAY...................................... One day
I know of a few Quadradrive's that haven't locked as well, but I personally think that this is because the fluids in the diffs wasn't correct. If you don't run the right diff oil (and correct ratio of friction modifier which is critical) they don't work properly. I guess it is a question about the activation. Once the Quadradrive is fully activated it works exactly like a locker.
oh and I would think that apart from getting the fluid ratios right etc, if you had a leaking diff or axle seal this might cause a problem too as the system might not be able to build up the hydraulic pressure that is need to activate
I've got an OX Locker (cable selector)in my front Dana 30 and had a Detroit TrueTrac in it before that (which I still have for sale if anyone is interested!!!) and I've got an Aussie Locker in my Dana 44A...
Didn't cost me a whole lot to get locked front and rear and I sure didn't have to swap axles!!
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1996 XJ with a few mods
2003 WJ with a lot of mods
2009 XH with no mods
Thanks guys for the info, I have heard that they have stopped making the Aussie lockker for the 44a?? will proberlly go with the arb up front to start with and see how it goes....
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i have seen/ driven a few different WG's with Quadra Drive and they Don't always Lock.... I agree that QD is great but i would Not personaly put it on the same level as a Locked Diff.. I have been in a bogged WG QD and it was crossed up and Not getting any power to the wheel with traction.. 
