Air bags for Navara D40

Submitted: Monday, Mar 22, 2010 at 20:59
ThreadID: 77097 Views:3056 Replies:1 FollowUps:5
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Does anyone have any experience with Boss Air Assist Kits and/or Suspension Stuff in Springwood Qld?

I'm currently considering these for my Navara and would appreciate any suggestions or recommendations.

Alister
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Reply By: Rocko Wallaby - Tuesday, Mar 23, 2010 at 08:10

Tuesday, Mar 23, 2010 at 08:10
Heya
I've fitted a set of these to a D40 Navara a few months ago.
Fitting was easy enough. I have a hoist, which makes it really simple, but it can be done easily enough with just jack stands.
While they worked well, I've since had a significant amount of contact with those who either like them, or don't. Mainly, because there have been apparently some cases of the airbag suspension "breaking the back" of the chassis.
Whether this is the truth or not, is hard to say. Scared the crap out of us though.
As we'd originally put in the airbags to solve the ludicrous sag in the back end (ie. it hit bump stops when only loaded with a 200 canopy!), the pressure in the airbags to correct was moderate. So, we've since arranged a rear leaf suspension upgrade (ie. extra leafs) through Carrolls suspension, at Wacol (QLD).
Since then, the load has been taken up by the springs, and the airbags are used just to additionally adjust ride height. MUCH better idea.
Hope the info helps.
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Follow Up By: Rocko Wallaby - Tuesday, Mar 23, 2010 at 08:12

Tuesday, Mar 23, 2010 at 08:12
Oh, just one more thing. If the chassis breaks it's back due to airbags, Nissan won't want to know you. You're on your own. Not a warranty thing, and a BIG expense to fix.
Is it likely? No idea. But it has happened, and I won't want to risk it.
Scotty
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Follow Up By: timetaxi - Tuesday, Mar 23, 2010 at 08:42

Tuesday, Mar 23, 2010 at 08:42
Thanks, Scotty

I doubt if the airbags break the chassis - more likely people thinking the can add the load capacity of the bags to the original load...

Alister
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Follow Up By: Member - Tour Boy ( Bundy QLD) - Tuesday, Mar 23, 2010 at 08:58

Tuesday, Mar 23, 2010 at 08:58
I remember reading a post about 12 mths ago about a navara with only 200kg on the back and the tub kept hitting the rear of the cab on bumps. Maybe an inherantly weak spot in the chassis. Don't remember if it was a D22 or D40.

Cheers
Dave
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Follow Up By: Rocko Wallaby - Tuesday, Mar 23, 2010 at 09:09

Tuesday, Mar 23, 2010 at 09:09
Spoken with someone this happened to a while back. As he said, Nissan's excuse on voiding warranty was that the shock load is put into a place where it isn't meant to be...a single point where the bump stops are, rather than spreading the load to the dual mounting points of the rear springs. Add extra load to the back, and it can (and has) happened.

If I had to do it again, I'd go straight for a spring upgrade, and only use airbags to correct minor sag left over.

Again, that's my experience.

But good luck with it ;)
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Follow Up By: timetaxi - Thursday, Mar 25, 2010 at 11:06

Thursday, Mar 25, 2010 at 11:06
Thanks, guys, for all your suggestions
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