new springs or air bags?????

Hi wizard1
my rear springs are not in too bad of shape and i actually do have poly air under there now but dont seem to get much from them, was thinking of putting the black more robust firestones type under as they seem like they would do a beeter job especially as i think they can take up to 100psi?

Dingo

I think you might be mixing things up a bit. The black Polyairs are airbag suspension - replacements for springs. the polyairs or firestone coilrites are coil "assist" devices in that they work with the coils not replacing them. You should not be looking to get a better ride or suspension out of them but rather to lift the back end when loaded. Indeed there is some thought that having them can limit articulation in the suspension by not allowing a spring to fully compress when the wheel goes over a large bump.

having said all of that I have used the coilrites and think they are great. Split one up near Weipa and could not convince the airbag man it was a design fault and will have to replace eventually. For next vehicle though I will be getting HD springs first and airbags second.

thank Gazza
you might be right about the firestone product replacing the suspension, but i recon i saw a 79 seris with these and still springs on rear! will have to check up.
i kind of recon i should do the springs, perhaps do the springs and just stick with the poly air as well will do?

Thanks for the input Jeff
i kind of agree, think i might post a question about what experiences people have had with poly air against firestone airbag man?

Also check out www.trucksprings.com as I and others on this forum have bought the firestones from them and got them delivered to oz for less than half the price to buy locally.

thanks for that
they would be the aussie built version, now all chineese but to OME specs so hope still good as your experience.
what sort of weight has the vehical been carrying?