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[MarkInBaltimore]

Hi, David,

Sorry, I never kept or never knew the part number.

Correction on my post after checking my old notes: the new bags were not taller, just thinner. Because they are thinner, when they inflated, they did raise the rear maybe 1/2". Uninflated, they were supposedly the same height as the original ones that kept on leaking. Sorry for the confusion.

I have had the Airlift system on my 4Runner since January of 2001. No, I don't trailer a pop-up; I pull a 900 lb Trailex aluminum trailer with a 3000 lb rear-engined Porsche and about 350 lbs of tires and wheels on the tire rack. I also have a Tekonsha Prodigy and electric brakes.

I've never had a problem with sway. The Trailex is set up perfectly for a rear-engined car, and I've pulled the rig at over 80 mph. (To others, please, no flames about the speed.) My 4Runner was a barely adequate tow vehicle for my needs. It got the job done, but just barely. I know a guy at the track who has an auto 4Runner that he was towing a 2000lb trailer and a 2500 lb car plus another 350 in wheels, and he had no problems for his short pulls.

From what I was told, you can use the brake controller to tap the trailer brakes to settle any sway. At least for my aluminum trailer, you can't use a sway hitch since the stresses would torque the metal.

Hope this all helps!