hi everyone,

I have a 1994 hilux, with original SAS.

I bought it recently, and had the 4 shocks replaced with their OEM equivalent KYBs, plus the steering dampner,
the steering system was rebuilt (knuckles, tie rods, pitman arm, bearings),
and the column play was eliminated.
So it now goes straight and tight,

but the problem is (and I searched the forum but couldn't find an answer)

when I load it up with a normal amount of weight in the back (say 350 kg- 700 lbs)
it starts to pitch and toss like a sailboat on a regular blacktop road

I wonder if it's because of the leaf springs front and rear being 18 years old?

I would really appreciate the helping hand

 

Ya think?

:wabbit2:

 

ok, not squirrely then

it pitches and tosses all rabbity
:wabbit:

 

If it only happened after shocks then perhaps you got too light a valved shock.
Otherwise it's your old arse suspension carrying too much weight.

I think it's the OP that's squirrely.

:wabbit2:

 

the shocks are OEM spec kayabas, and are brand new
the amount of weight is not that great
it's not sagging too much under load, and the smallish 3Y engine doesn't seem to concerned

has anyone had this happen to them?

thanks for the help

 

Perhaps it's how you're loading. And with the double cab (assuming it's the truck in your pic) you're pretty much forced to put your load behind the rear axle, which will then act as a fulcrum and lighten the front end.

Have had this problem in the Tacoma I used to drive for work when hauling very heavy engines or transmissions with them loaded at the tail gate. A 3000 series Allison loaded at the back of the bed was SKETCHY at 60mph, trans is somewhere around 1000-1200 pounds and it was all behind the rear axle because that was as far as the forklift where I picked it up would reach.

 

Are you sure they installed the shocks? Just covering all the bases.
I only had one shock in the back of my pickup for a while.
That made things rather squirrely and bouncing, especially if I over a bump around a corner.
You may not have shocks or you have the wrong shocks.
Put the old ones back on and see if the problem goes away.
If it does, then go light a fire under someone.

 

Hi,
yeap, it's a 4 door, that's mine in the pic
it might be that the weight in the back creates the natural effect
but then the design fault would have jumped out decades ago

all the shocks are tight
they are the OE spec, OE brand

I do have 31" x 10.5 tires
could the extra weight be responsible?

do the 18 year old leafs have nothing to do with it all?

thanks again!

 

I would say it sounds like leaf spring bushing are wore out or gone......I had a samurai that was like that and the leafspring bushings where all but there.