4 linking the Trail Rig

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

bggrnchvy

Supporting Member
Supporting Member
Joined
Dec 3, 2009
Messages
288
Reaction score
21
Location
Bay Area, CA
A couple of years back I noticed I wasn't getting the performance out of the front suspension I wanted with leaf springs. I used low spring rate, high unloaded arch Alcan leafs with an offset pin and had a front anti-wrap to keep my driveshaft intact and it flexed great. Sadly though there was a lot of sway and it just wasn't fun at high speed.

To fix that I spent the better part of a year picking up parts here there to remedy the problem with a triangulated 4 link (I went to full hydraulic steering at the same time).

You must be registered for see images attach


I also bought a ton of tabs and brackets to make the fabrication move along faster as nothing sucks worse than trying to save $4 here and there and wasting hours as a result.

First things first, I ripped the front suspension and axle out of the truck.

You must be registered for see images attach

You must be registered for see images attach


The next phase was to remove all the IFS bracketry I had left over as it was now in the way. OBS shock mounts are a bear to remove even with a plasma, grinders and a sawzall.

You must be registered for see images attach


Weld washers were added around bolt holes for years of beating without oblong holes.

You must be registered for see images attach


Due to the size of the joints on the frame side (Ballistic 3.0 REV1) I had to bore the hole diameter and turn down a nut and weld it in place to prevent interference with the frame rail.

You must be registered for see images attach

You must be registered for see images attach

You must be registered for see images attach


With a clean axle housing I began make the truss and tacking link mounts on as per my layout.

You must be registered for see images attach

You must be registered for see images attach


Plates were cut from 12ga to box in the truss.
You must be registered for see images attach


Holes were made and dimples added.
You must be registered for see images attach


Down tubes to the ram truss were added.
You must be registered for see images attach


Coilovers were assembled.
You must be registered for see images attach


Plates and added tube were fully welded, including the nodular housing.
You must be registered for see images attach

You must be registered for see images attach


Frame side lower mounts were contructed using Ruffstuff lower mounts, bent tubes, cut and dimpled plates and straight tubes.
You must be registered for see images attach

You must be registered for see images attach
 
Last edited:

bggrnchvy

Supporting Member
Supporting Member
Joined
Dec 3, 2009
Messages
288
Reaction score
21
Location
Bay Area, CA
The frame rails were cleaned and smoothed out and coilover hoop mounting plates and boxes were created.
You must be registered for see images attach

You must be registered for see images attach

You must be registered for see images attach

You must be registered for see images attach

You must be registered for see images attach

You must be registered for see images attach


Flange mounts were added for diff cover removal.
You must be registered for see images attach


The inner side of the frame was plated and boxed back further.
You must be registered for see images attach

You must be registered for see images attach


Axle side lower link tabes and gussets were burned on.
You must be registered for see images attach


Frame side link mounts were modified and welded in place.
You must be registered for see images attach


Joints and hardware were assembled.
You must be registered for see images attach

You must be registered for see images attach


JMX16t compred to a 1/2" rod end.
You must be registered for see images attach


Mockup links were made from 1-1/2" .120w 1018 HREW and some butt tack welds.
You must be registered for see images attach

You must be registered for see images attach


Factory LCA crossmember was found to be an issue so welded in a peice of 2x3 .120 wall furhter forward and then removed it.
You must be registered for see images attach

You must be registered for see images attach


Final links were made using fillet and rosette welds. Upper link material is a 2" .250w 1020 DOM and lowers are 2-1/4" .375w 1020 DOM. Even with short links they ended up being pretty heavy.
You must be registered for see images attach

You must be registered for see images attach


A sway bar was added along with end links made from 1" DOM and 1/2" rod ends.
You must be registered for see images attach

You must be registered for see images attach
 

bggrnchvy

Supporting Member
Supporting Member
Joined
Dec 3, 2009
Messages
288
Reaction score
21
Location
Bay Area, CA
I modified the axhaust to clear the new link mounts as well.
You must be registered for see images attach

You must be registered for see images attach


To provide for slowing the axles upwards acceleration at speed I added pneumatic bumpstops as well in some gusseted cans following dissambly and destroking to work with my suspension.
You must be registered for see images attach

You must be registered for see images attach

You must be registered for see images attach

You must be registered for see images attach


The spacer turned on the lathe.
You must be registered for see images attach


Showing the change in stroke.
You must be registered for see images attach


A last gusset was added to the truss as well as limit strap mounting points and the unit was painted.
You must be registered for see images attach

You must be registered for see images attach

You must be registered for see images attach


The axle and links were slung under the truck and everything was attached including the limit straps.
You must be registered for see images attach

You must be registered for see images attach

You must be registered for see images attach


The frame was also primed and painted.
You must be registered for see images attach

You must be registered for see images attach


With that the suspension was completed.
You must be registered for see images attach

You must be registered for see images attach
 

Mike

I'm Awesome
Joined
Dec 2, 2009
Messages
1,585
Reaction score
459
Location
Mass.
Thanks for bringing this over here! Don't forget to start a build thread for your truck so you can keep a journal of all your work
 

Greg

Über Mod
Supporting Member
Joined
Dec 2, 2009
Messages
3,563
Reaction score
111
Location
South Dakota
awesome build thread man. Such attention to detail.
 

88GMC

I'm Awesome
Joined
Dec 3, 2009
Messages
289
Reaction score
9
Location
NY
Awesome work as always Kyle. What spring rates did you end up going with on the coilovers? Your truck is the inspiration for mine. Keep us posted.
 
Last edited:

bggrnchvy

Supporting Member
Supporting Member
Joined
Dec 3, 2009
Messages
288
Reaction score
21
Location
Bay Area, CA
Thanks for bringing this over here! Don't forget to start a build thread for your truck so you can keep a journal of all your work

I will, I'll work on getting a few more tech articles condensed here and then I'll start it and put them there as an all in one.
 

bggrnchvy

Supporting Member
Supporting Member
Joined
Dec 3, 2009
Messages
288
Reaction score
21
Location
Bay Area, CA
Awesome work as always Kyle. What spring rates did you end up going with on the coilovers? Your truck is the inspiration for mine. Keep us posted.

12" 300in/lb spring over a 16" 450in/lb spring.
 

CodyB

Grease Monkey
Joined
Dec 9, 2009
Messages
1,277
Reaction score
20
Location
Arkansas
So what company did you design that setup for?

Thats some insane fab skills you have there sir, Very nice. This is how GM should have done it the first time haha.
 
Top