Just to the left of the pumpkin on the rear axle there is the little connection with a boot and goes up to some little box on the passenger side that has more lines coming out of it. What is that thing for? This isn't a pic of my rig, but I noticed it when I was crawling around under there yesterday.

http://good-times.webshots.com/photo...02969083pcFRGV

 

That would be your LSPV. Load Sensing Proportioning Valve.

Google it

 

lspv. it senses the load in your bed and adjusts the brakes accordingly. be glad you have one...mines missing!

 

Thanks guys! I guess my 89 xtra cab had one, but I don't remember seeing it on my 93 4runner.