I made this FAQ because there was so many
questions being asked about the 63" Chevy 1/2 ton spring swap for the rear of
Toyota 4x4s. And I was getting tired of answering the same million questions
everyday. This swap is becoming so popular I wanted a place where people can
come and have all there questions answered. Without me saying the same answers a
million times. Below are all the questions from, people asking me, gathered from
around the internet and from the Pirate message board. Any contributions to
add/help this FAQ along are gladly accepted. So here they are.[/b]
What year and vehicle do you get the springs
from? The correct years are 1988-1998 1/2 ton Chevy or GMC
truck. Don't listen to anyone otherwise. And don't worry about the front
suspension it does not matter. You only need the rear springs. Those are the
only years you can get 63 inchers.
Where do
I get these springs? From a boneyard! All you need is the
rear springs off an 1988-1998 1/2 ton Chevy or GMC truck.
Does it matter if it's from a 2WD or 4WD? No it does not matter if they are from a 2WD or 4WD. The 2WD have
3 leaves plus and overload leaf. The 4WD have 4 leaves plus and overload
leaf. The 2WD are the most desirable because they are softer with only 3
main leaves and are good on a pickup. You can use the 4WD but you will have
to pull out one leaf. Don't get me wrong the 4 leaves will work but most
guys run 3 plus overload leaf. Some just run only three leaves. Also some
people run add-a-leafs too. Just depends on what you want to achieve.
How much should I pay for the springs? Pay no more than $100 a pair.
How do I mount these loooog springs to my Toyota? You must get a new front spring hanger and weld it on the flat
part of the frame forward of the stock spring hanger. For the rear shackle
hanger, you can either go with a double shackle set-up (very popular) or weld on
a new hanger back about 4 inches from stock.
Where do I get new front spring hangers? You can either buy Jeep CJ spring hangers (some say they hang
kinda low) or make your own out of 3.5" x 3.5" x 1/4" or 3/16" square tube.
You can't use the chevy front hangers they are shaped to oddly to work.
Can you explain the double shackle set-up? Ok the double shackle set-up works like this. You connect one
Toyota style shackle from the factory rear hanger (let it lay flat against the
frame) to another shackle going straight down to the spring. Most people run
the stock Chevy shackle as the second one that mounts to the spring. Or you can
make your own shackles. Doing the double shackle set-up is just a cheaper
and easier way to do the rear of the springs. No need to weld in a new hanger.
It also gives you a bunch of extra suspension droop, which is a good thing!
How far forward do I mount the new front
spring hanger? If you are replacing 48" long stock springs,
Mount them 11" forward of the stock spring hanger center hole to center hole.
This will position the axle in stock location. Or drop a plumb line from the
frame down to the center pin of your stock springs. Leave it there. Take off
stock springs and line up chevys.
On 3rd gen trucks,
mount the front hanger 9" To 9 1/2". 9" the axle will sit slightly rear
of center and 9 1/2" should get the axle centered.
On
1998-2000 Tacomas mount the front spring hangers forward 7.5 inches.
Earlier Tacomas have shorter springs, but I don't have the measurements for
those. Anyone?
Some new info from Grabber(Pirate4x4 BB)
for 89-95 trucks: I did a double shackle set-up leaving the rear shackle
hanger in the stock location. Here are all the specs: Front spring hanger was
mounted 8 1/2" forward of the stock hanger, eye to eye. ( I stated; I did it 9"
before, but is actually 8 1/2", really 9" would be about perfect, but the less
you go forward the better the double shackle will set up, I forgot and lost the
info I had written down on my computer. Sorry.) I then used 2" x 3/8" Flat bar
for the shackles. The top shackle is 5 1/2" with 3/4" washers on the inside of
the shackle against the bushings (to space it slightly). Then I used an 8"
shackle for the second shackle, putting it inside the top shackle, with a pipe
spacer and washers between the bottom shackle (I used a 3/4" bolt at 6" for
this, and size 9/16" to 3/4" will work fine). This leaves the bottom shackle
slightly angled back. Looks and works good. With the mount being 8 1/2" forward
of the other mount on 89'-95' trucks (which I think is really the best spot),
you may need to lengthen your year drive- shaft about an 1" or 2", it works but
its way down on the splines. I had another driveshaft out of a 79' that had new
u-joints in it, and it work perfect, they are slightly longer. And I am using
the stock d-shaft as spare, it should work fine as a spare. I have a buddy who
put his mount at 9 1/2" and I will let you know how that worked out, as far as
the drive-shaft and rubbing in the wheel well at full compression. But even with
the d-shaft problem I feel 8 1/2" puts the wheel in the perfect spot. Another
way of placing it, if you have a 2nd gen. 4runner, is to put it exactly in the
center of the body mount at that location. That is where 8 1/2" ends up. Since
4runners dont have an original mount.
How wide
are the Chevy springs compared to Toy springs? The chevy
springs are 2-1/2" wide and Toyota is about 2-1/4" wide. Please note on the
Chevy's that the sleeve in the bushings at both ends of the spring is 3" wide.
Thats why you must use 3 1/2" box tube (1/4" or 3/16" wall) for the front hanger
(3" on the internal width).
Can I use Toyota
stock U-bolts and spring plates? Yes you can use the stock
Toyota U-bolt but you will have to grind the springs a little bit to get them to
fit.
What about a u-bolt flip kit? Can I just
flip the factory u-bolts and spring plates? No. You will need
new u-bolts and a flat piece of 1/4 or 3/8 steel to mount on top of the springs.
How much lift do these springs give? You will get about 2-3" of lift. But the springs are very soft,
so most people end up using some lift blocksÊor add-a-leafs as well.
Should I run bumpstops? Yes! They must be big enough to stop the springs from going too
much past flat, they bend right near the front mount if you go to far. So
bumpstops are a must!
What length should the
shackle from the frame to second shackle be? What about the second shackle? Length of shackle from frame to second shackle should be about 5
1/2"-6" eye to eye. Length of shackle from first shackle to spring eye should be
about 3 1/2" eye to eye or you can just use the stock Chevy one.
What size bolts do I need to mount the springs? 9/16 x 5" grade 8 bolts with lock nuts for the spring eyes. 19mm
or 3/4 x 5" for the rear factory hanger
Can I
still carry heavy loads with these springs? Yes, especially
if it has the overload. Remember, these springs came off of 1/2 ton trucks, they
can support a decent load.
Can I put Chevy
springs on a Tacoma? Yes. Many people have done it
successfuly. For 1998-2000 mount the front spring hangers forward 7.5 inches.
Earlier Tacomas have shorter springs, but I don't have the measurements for
those. Anyone?
Do I have to remove the gas
tank to weld on the passenger side spring hanger? No you
don't have to, but it would be easier to weld if you do. You can get away with
only welding three sides of the hanger and by filling a 9/16" hole in the middle
of the hanger with weld. It will work. Just make sure you keep the gas tank skid
plate on and shield it also.
How is the ride
with these springs? The ride is excellent on the street and
even better off road. LOTS-O-FLEX and they ride like a Cadillac! There is such a
big difference between these and stock springs that it's unbelievable.
Do I need to run a track bar with these
springs? What about axle wrap? No a track bar isn't
necessary. The leaves are plenty thick enough to resist kinking. Also you can
try using the factory Chevy overload leaf, but cut the leaf flush at the rear of
the spring pad and leave the front about 8" long or so. This will help prevent
any axle wrap.
Can I run these springs under
the axle? Yeah. But why would you want to? Unless you were
building a prerunner. LOL
Is it worth it to
mount these springs on an IFS Toyota? DEFINITELY! It will
make a HUGE difference.
Can I just buy
aftermarket lift springs for an 88-98 Chevy truck? Yes you
could but the whole purpose of this swap is you get the most bang for the buck
out of stock Chevy springs. If you buy aftermarket springs you will pay through
the nose!
Can I still run a stock rear
driveline with this swap? Yes!
Will I need longer shocks? Yes! You will
definitely want longer shocks to take advantage of all that new travel you
gained. Get Rancho 5012 or 9012's or Procomps. Bilstein 5100 series are also
great shocks.
If i attach them to an IFS truck
without a front end lift, will it stick the rear end WAY up in the air? No, as long as you only run three leaves with no lift blocks you
should be fine. I am running that same set-up now. I have no front IFS lift and
the rear is not that
high.
This was from the Pirate Board and not written by me (Dean)
This information is for reference only, If this information is used to alter your
truck it is done with the understanding that you are responsible for your own actions.
