My 80s chevy 3/4 ton truck rear suspension rides extremely rough. But it is
also sagging a bit in the rear. How can this be? If the springs are
sagging, that means they are worn out, so shouldn't it ride smooth?
I don't want it to ride like a cadillac, but I'd like to be able to go over
a bump without my head banging against the roof.
The shocks on the truck are definitely shot. But don't shocks just
control up and down bounce? In other words, do shocks firm up when they
are worn out? It seems to me they would become softer and softer until
they aren't doing anything.
Sometimes spring loose arch a bit with age but note there actual
deflection rate which means they can sit lower and still be stiff.
Yours is being aggravatted by the fact that you are likley resting on
or near booster leaf since it has sagged a bit and the booster is
really stiff and when you hit a bump it can really cause rear end to
jolt some unloaded and bounce a lot more than it should. .
A simple and cheaper fix would be to remove bottom leaf or 2 (not
booster) and add a new leaf(2) in its place that is arched a lot
higher as it will raise the unloaded height of vehicle a good bit and
off of booster. If you never carry a lot of weight (like 3000 lbs or
more) you could just remove booster completely and insert about a 1
1/2 or 2 inch spacer block in its place and be done with it. On a
old truck, sping eye bolts at end can sometimes be fused in from rust
and a pill to remove while when changing leaves you can easily saw off
spring stack center bolt and replace it for a few buck. One importtant
tip though if you go the leaf replacement route, get a large c clamp
to compres springs when removing bolt and installing a new center
bolt. It will make life a LOT easier. WIth some good air tools you can
get the job done in abut a few hours at most. (I have done it many
times and can do it in under a hour most of the time now. )
After years and loads, the spring steel seems to turn into just steel. I've
had the same problem and no tire pressure change or shock swap will make any
real difference. Get a new set of springs, front and rear.
Any recommendations as to brand etc. for a stock 89 K5 ? I find rear
springs, but front are different mfg. Any other applicable year ? Rears
prices run $250 - $390.
"Shades" <shades_1970(at)netins(dot)net> wrote in message
Look around your area..you might have a local spring
shop like we do here in Western pa. He works on triaxles and semis
bought also has smaller spring stock..He did my old chevy truck, that had
a bunch of broken leafs and made brand new springs right there! Just
like a blacksmith shop. Sheared the spring stock to length, curled the ends,
put them together, dropped the old ones, and I was outa there in 2 hours!
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