Global multi leaf rear spring, anybody know spring design?

[P. A. Schilke]

The crazy bit are the inverted overload springs, almost seems that the spring is designed to be bent backwards at full load.

Yep!

Sponsored

 

[Fitzmotor]

The global springs do seem softer in most ways, I did a test when I had only 1 global spring on, with the truck frame still on jackstands I centered the jack on the housing, as I jacked it up the first few inches (approximately) the Tremor spring compressed first, then at about 1/2 way in the total travel the global spring started to really compress more and was well ahead of the Tremor spring by the time the frame started to come off the jackstands, then they were even. very unscientific test, I was just checking approximate height, that's when I pulled the 5 leaf from the global pack, as a note the global with all 5 leafs is the same ride height as the Tremor spring.
So as I stated earlier the global spring is great over all large bumps, driveways (side to side is reduced) especially speed bumps, it's the little highway bumps I am still unclear on, seems stiffer, I am going to switch them again I think, I'm so glad it's a easy job.

 

[SOHK_Alumni]

Taking a second look at the pics, it appears that the global springs have close to the same arch, but a thicker total spring stack so unloaded, are a bit "taller". Explains why a softer spring only offered a slightly lower ride height.

 

[Fitzmotor]

Okay, I have switched back to the Tremor springs, I will see how they compare, got it down to 15 minutes a side, but that's with it already on the jackstands.

 

[Fitzmotor]

Okay, having done somewhat back to back spring test, the Tremor and the Global spring are basically the same as far as ride, over bumps, side to side rocking and ride height.
I removed the 5th leaf on the global spring which does lower the back 5/8" from the Tremor spring, although the 5th leaf is part of it having higher load rating (if D fresh and Google are right)
In my opinion, overall the better spring is the global, it is a bit better over the bigger bumps and despite what I thought previously, it is better on the highway, my wife couldn't tell but my daughter in the back seat confirmed that it was smoother, (she is a gear head girl, she drives my 500hp 65 mustang with a six speed)
It was only $170GPB for the two springs and $28GPB for shipping, (they are 99$ each but I offered 170$ for both) converted to US dollars it was $251 and $40 so for less than $300 USD for the springs, a smoking deal, I think if somebody bought 20 pairs I bet they would sell if the Ranger community knew of them.
Anyways, that's my two cents, only worth a penny?
For anyone who may be interested; https://www.ebay.com/itm/114729135896

 

[wilsoN_]

Yep!

Phil can you comment on the springs rates for the factory springs, the tremor and the global spec? I'm trying to get a softer ride over bumps.

 

[Fitzmotor]

I don't know how the FX4 springs are, the global ones are pretty soft, softer than the Tremor, if you can drive a Tremor and compare it to your truck, then if the Tremor is a improvement you would know the global spring is little softer, it's too bad you are not closer, it only takes less than a hour total to swap them, I'd give you these to try, if you liked them, I would have you buy a set to replace them, it's only $300 which is dirt cheap for basically brand new factory springs.

 

[P. A. Schilke]

Phil can you comment on the springs rates for the factory springs, the tremor and the global spec? I'm trying to get a softer ride over bumps.

Hi Wilson,

Don't have access to the info. Up in Michigan tending to handicapped daughter. hope someon has info.

 

[wilsoN_]

I don't know how the FX4 springs are, the global ones are pretty soft, softer than the Tremor, if you can drive a Tremor and compare it to your truck, then if the Tremor is a improvement you would know the global spring is little softer, it's too bad you are not closer, it only takes less than a hour total to swap them, I'd give you these to try, if you liked them, I would have you buy a set to replace them, it's only $300 which is dirt cheap for basically brand new factory springs.

My brother owns a Tremor and they’re substantially better.

 

[gryder]

After messaging Fitzmotor and picking his brain about these springs I too picked up a pair. Thanks to Mike for doing all the research to find these. I can say they are softer than the fx4 springs. I still have my stock fx4 rear shocks and wanted to see if the leaf springs alone could change/improve the ride quality.

I believe it did, going out of the drive way there is less rocking motion that use to happen. driving my regular route roads that had bad uneven pavement that you feel in your back was less jarring. going over speed bumps was a little softer in the rear, less bouncy motion. It still drives like a truck but it’s a little smoother now.

The freeway driving is where I noticed the biggest difference. I drive 30 miles to work and all the little bumps and dips that i use to feel in my butt and back were way less noticeable. I would say the global springs are 30-40% smoother/softer, how ever you want to word that, and that’s with the stock fx4 shocks, I can only imagine the ride quality will improve after I get rear aftermarket shocks. I can say driving to work now is less tense because now I don’t expect to feel all the imperfections In the road.

Although they have 3 regular leafs and 2 overload, it only raised the rear 1/2 an inch. Stock height I was at 39.5 from the ground to top of wheel well. Now its at 40 inches. That’s with my 255/80/17 tires.

And no joke the springs where cheap. I paid $320 total and that includes shipping. I couldn’t believe springs coming from the UK would only be like $25 dollar shipping.

Also put on rear poly bushings from SuperPro. Part number: Kit168K-1. I guess there are no companies making poly bushings for the rear of our truck yet here in the US. I looked at Energy Suspension, Whiteline and others And no one had any.

Also got new bolts from rough country. 9/16-inch Square U-bolts (2.5 x 8.5).

I think more people would be happier running these springs. It’s a factory ford part, cheap price, looked brand new and ride better then the single leaf design.

Garrett

 

[Fitzmotor]

I'm glad they worked for you, I was unsure about posting up the info on these springs, but I thought as many people here complain about the ride of the single spring, these springs are cheap, they are a factory spring that is basically new and a multi leaf.

The seller has 40+ pairs that were pulled from fleet vehicles that were converted to airbags. I cant see ebay continuing to absorb the majority of the shipping cost, but who knows.

I got them hoping they would lower the back a bit, no, they wont, I had them De-arced 1.5" to level my Tremor.

 

[Glocker]

Damn @Fitzmotor - I wish you had an add-a-leaf kit to add to the global springs to see how those worked together!

 

[Fitzmotor]

You have a Add A Leaf for towing or to raise it up, or??

 

[Glocker]

You have a Add A Leaf for towing or to raise it up, or??

Both!
I had a lot of weight in the bed that sagged the truck a little in the rear, plus I tow a boat. It put it back to where I wanted it to sit, but it's a little stiff with the stock springs that came on my FX4.

 

[Fitzmotor]

The global spring is very close to a Tremor spring, I think it has a higher load rating than the US springs.
They will only raise it 1/2 inch according to gryder, they were the same height as my Tremor spring.
The ride on the global springs is good, equal or just a little better than the Tremor.

Here is the ebay link

https://www.ebay.com/itm/114729135896

Sponsored