2012 Squeeky Rear End

I have a 2012 DCLB TRD Sport with 7400 kms (~4600 miles) on it.

Every time time I drive over a small bump I get a very annoying squeak from the rear end. I can replicate this noise by bouncing up and down on my rear bumper.

I'm assuming the noise is from the leaf springs so I was wondering if anyone knew a solution to this problem besides pressure washing and lubing them up (with dry lube / diff oil / etc.)

I've already been in contact with my dealer's Service Manager and he was more than happy for me to bring in the truck and they can diagnose the problem there. I'm all for it, except for the hour drive it takes to get there.

Anyone know of a quick solution that may remedy this problem?
(Don't say re-build the leaf pack because that will take me more than the time it would take to travel to and from the dealer )

 

http://www.tacomaworld.com/forum/2nd-gen-tacomas/98055-diy-squeaky-leaf-fix.html

 

or just blast the leaf springs with Fluid film, it seems to hold up for a good 6 to 8 weeks before you need to re spray