Giving Up On 4kq Clunk

[griz]

Huw Powell wrote:
> 
> > Ball joints and tie rods are good.  Stock setup.  Strut cartridges are good.
> >   Clunks when coming on and off accelerator.  Seems to come from left rear.
> > Sounds like something is hitting bottom of trunk.  Minimal to no clunk when
> > differentials are locked.  I've been under the car while it was on a lift
> > with someone making it clunk using the accelerator and switching from 1st to
> > reverse.  Nothing moves much at all.  This is my second 4kq.  I bought it on
> > eBay because the owner said it didn't clunk.
> 
> yah, sounds like play in the rear diff.  grab both rear axles and see
> how much you can rotate them against each other, and with each against
> the center driveshaft with diff locked and unlocked.  see if you can
> make the "clunk" by hand... if you still feel like it, that is!

How is this remedied ? What are the usual suspects ?