lowering leaf springs.

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well call me an idiot but i have a 99 mercury villager that shares the same as a 99 nissan quest.

basically i want to lower the van just a little bit yet i know about springs, but about leaf springs im lost. i been researching and there is a way to do it with a lowering block kit and some bigger clamps that go around the axle....would this be fine, for just a 1.2 or a bit more drop? is it safe?

i also read online and alot of people who have leaf springs have 3 or 4 of them, i have one solid one which makes me wonder if i can still go for the clamp kit?

if anyone can help me that would be apprciated.
 
Take an oxy torch, and point it at the leaf until it's nearly red.

Springs will lower themselves.

If the leaf passes beneath the axle, it can be lowered with lowering blocks. They are illegal in some places, and can cause axle wind-up.
 
Torch thing is kinda drastic, because you can't controll how much it'll drop!

As Shannow says if spring is beneath axle they're lowering blocks, if spring is above axle they become RISERS!

Another method is to shorten shackle straps holding rear of spring in place.

Bob
 
my spring sits above the axle =/. i was thinking last night in how the spacers work with my van...man.

if you shorten the shackle straps, does not that mean you need a smaller spring?

wish i had a GM or a ford that i can go to the store and buy a set you kno? or at least have a solid rear axle with a coil spring haha.

i wonder what can i do, torching...id want another set to do that just incase i need to go back to factory.
 
Shannow said: "can cause axle wind-up."

This van is FWD, leafs are on the rear...shouldn't be a problem.
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Find a shop in your area that re-arches (de-arches in your case ) springs. They would be able to set the spring for just about any reasonable height you want. It's done with the spring off the vehicle.

Don't torch them to lower it, that destroys the heat treatment of the springs.
 
"if you shorten the shackle straps, does not that mean you need a smaller spring?"

No. It's done all the time. As long as there's still enough space between end of spring and spring mount that they're not touching. On Chev PU's, end of spring is above spring mount so we use LONGER shackles.

Bob
 
The shackles should be long enough that when the spring is it's longest (straight) there is no bind from the shackle not allowing the spring to straighten out. Otherwise there will be hellatious loads on the shackles and or spring buckling. He might get away with it for a long time...or not.
 
i went to local autozone today and i found a lift kit and it showed my leaf spring style, as a lowering kit....i wanted to purchase it but i dont physicaly see it lowering the van, only raising it.
 
Here is what I did on my 95 3.0 Caravanan.

It is not quite as dramatic as the Daytona struts and coils method, but you still have less wheel gap, much improved handling, and you will have more adequate ground clearance under the cross member.


It never either bottoms or tops out, front or rear, if you use this method.


The front:

Use Caravan struts and 3.0 Daytona coils, instead of using both Daytona struts and Daytona coils. This way you still have good travel and ground clearance, and you get a 1.5 inch drop. Best of both worlds.

I put on new Koni red adjustable Caravan struts, and I put on new heavy duty "cargo" PR coils for 3.0 Daytona with AC. The coils really didn't cost much. I got them from Parts America. Koni red adjustable struts are expensive. They are well worth the money though.

I highly recommend installing both new coils and new struts.

This setup works just like lowering springs, and it lowered the front by 1.5 inches. That doesn't sound like much, but 1.5 inches made a real difference in both function and appearance. I still have adequate travel, and while slightly softer, the front is not as soft as lowering springs usually are. They made the front of my van firmer than it was on the OE struts and coils.

The rear:

I recommend that you replace that nivomat single leaf with a multi leaf. You can get them from a good recycler. Or you can buy new ones, recommended, because they really aren't that much. Rock Auto has them at a good price.

Then you can do this.

I had the typical multi leaf, 5 leaves, springs in the rear. I took out the two lower 'load assist leaves', and that dropped the rear, 4 inches in my case, so it matched the front. I also put on Monroe Sens A Track shocks for Caravans. Pretty good shocks IMO. I like them better than the KYBs I used to have, and they were cheaper too.


You may, or may not, need to do the following also.


I also installed an Air Lift 1000 Load Assist rear spring kit, for when I carry extra weight or I want the rear extra firm. The only down side is that you have to top up the pressure, every couple of weeks, to keep a minimum of 10lbs in them. If you don't they wil wear out prematurely. I am getting their on board pump with pressure sensors soon.

air-59520_w.jpg




I really like the results I got using this lowering method. Handling, especially cornering, has greatly improved, and appearance has also improved quite a bit.

Hope this helps.
 
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