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Rear end sag

Submitted: Monday, Jan 16, 2006 at 07:19

ChrisB

I’ve had OME springs (2 inch lift) and shocks on my 100 series for 3 years now and think they are great. However they are the medium weight ones and I get a lot of rear end sag when the car is loaded. Unloaded the car sits and handles perfectly.

I’ve decided that something has to be done to correct the problem. But what? Should I replace the rear springs with OME heavy-duty springs, same as what I’ve got but with the extra 200 kg carrying capacity or add some Polyairs? What are the advantages and disadvantages of either one?
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ThreadID: 29734 Replies: 5
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AnswerID: 148856   Submitted: Monday, Jan 16, 2006 at 07:34

Member - Nick (TAS) replied:

Go the Poly airs.Pump them up when loaded to maintain ride height then lower them to min psi when unloaded for a great ride still.Got a set fitted to our 105 Cruiser(std height at the moment) just to maintain height when camper is on.Had a set on our 4 Runner for5 years and fitted some to parents 80 Series 3yrs ago and have never had a problem.
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AnswerID: 148860   Submitted: Monday, Jan 16, 2006 at 07:52

Member - DOZER replied:

Chris
A set of heavier springs (864's or for real heavy work, 868's) will give you a firmer ride unladen, slightly higher than what you have now aswell...they do make the car handle abit better and dont squat asmuch when weight is in the back.
Comparitively, medium duties are 19mm wire, 864's are 20mm wire, and 868's are heavier again....possibly 21 or 22 mm thick wire.
They would be easier to fit and cheaper than the bags. Not bagging the bags at all, but if you end up relying on them too much, you could possibly be let down.....sorry guys :@) seen them holed b4,although very rare, not sure how much they impede articulation offroad....ive always gone with the spring option.
Andrew

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b4 you bag me out, walk a mile in my shoes, then your a mile away and have my shoes :)
Reply 2 of 5
FollowupID: 402035   Submitted: Monday, Jan 16, 2006 at 08:07

ChrisB posted:

Andrew,

Originally, I thought upgrading the springs would be the best option, but I’m worried that everyday driving when not loaded would be compromised. Are the springs you mention progressive; i.e. soft to begin but firm up as the spring compresses?

Chris
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FollowupID: 402100   Submitted: Monday, Jan 16, 2006 at 13:35

Member - DOZER posted:

Gday Chris
The springs you should have now is an 863, and it is a linear load spring, meaning all winds are thesame. The 864 is aswell. Both these springs are load carrying springs, the 3 is rated at 250kg's constant and the 4 is 400 kg's. It sounds like you actually have 860's in the back, which are the comfort progressive spring.... if you dont carry much around in the back as a norm, i wouldnt go with load springs...but if you have a Kaymar on the back and draws in the back, then they are ideal.
There are a few options open to you, air shox, air bags and probably even more safe would be load leveller bars.....not obvious to most, but weight on the towbar takes weight off the front wheels, effecting braking and steering....load levellers are excellent for my van....i lost a wheel around a corner last trip away, and they may have saved me having an accident aswell.
Andrew

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b4 you bag me out, walk a mile in my shoes, then your a mile away and have my shoes :)
FollowUp 2 of 3
FollowupID: 402101   Submitted: Monday, Jan 16, 2006 at 13:39

Member - DOZER posted:

Sorry Chris, thought you were towing for some reason......if you have 860 progressive rears, i have a set of 963's you can try, to see if you like them...i actually prefered the firmer ride of them over the 860's, as it wasnt harsh at all and made the car sway less in corners.
Andrew Wollongong

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b4 you bag me out, walk a mile in my shoes, then your a mile away and have my shoes :)
FollowUp 3 of 3
AnswerID: 148902   Submitted: Monday, Jan 16, 2006 at 11:14

desert replied:

Changing to the heavier springs WILL make the car ride harshly when unladen. It will also have it's arse up in the air too. Depends on how much driving you use it for, laden and unladen. The Airbags can be adjusted and will not compromise the ride when unladen because they can have the pressure let out of them then. However, if punctured off-road, you are left with no load assistance to your soft springs. But you can always carry a spare set, they are easy to fit, if need be. Personally, I use two sets of springs which I change depending on the trip and load I'm going to do, takes about an hour to change them over.
Reply 3 of 5
AnswerID: 148911   Submitted: Monday, Jan 16, 2006 at 12:03

Member - David 0 replied:

Mat of mine put heaviest King springs in his 80 and it fixed the problem. He complained about the heaviest OME's sagging twice. He loads his up a bit.

The Kings keep it level even when fully loaded and towing trailer.
He was told to keep a load in it tho, becasue it would ride rough. He is fine with that.
A man is a success if he gets up in the morning and gets to bed at night, and in between he does what he wants to do.
Reply 4 of 5
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AnswerID: 148936   Submitted: Monday, Jan 16, 2006 at 14:46

Darian (formerly Banjo) replied:

Don't miss Plunger's post and replies a few up on the forum..................

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