Is there such a thing as rear coil spring clocking for GMT900's?

[5StarCustmSolutns]

Feel like I read somewhere that both pigtails should be facing outward?

But cant remember if it was upppers or lowers or my imagination?

Anyone know anything about this?

 

[Joseph Garcia]

From what I remember, both the coil spring base and top cup retainers have flat bottoms (no grooves in the cup retainers for the spring ends to fit into). As such, I do not believe that there is any directional positioning for the rear springs. Also, purchase new lower and upper rubber insulators, if you are going to change out the springs.

 

[SpareParts]

When i had mine out i just took note of where the tags were positioned on the spring in relation to the body and put them back close-ish.
I don't think it really matters though.

 

[mikez71]

I forgot which way my springs were facing!
But the rubber isolator on the bottom overhangs the perch on one side and deforms there, along with a spring end indentation.

Apparently, according to charm.li: "Important: Note the orientation of the spring as they are directional."

I wouldn't have thought it matters either considering the perchs are flat.
Looking at their (generic?) diagram, the spring end pigtail is located inboard on the upper side.
When the spring is being compressed up (and inwards) the upper outside edge load more, and maybe if the pigtail was on that side,
it might chew into the isolater/perch more easily? At least I can convince myself that's the reason!

Coil Spring Replacement — 2011 Chevrolet Tahoe 4WD V8-5.3L Service Manual | Operation CHARM

Detailed repair manual for the 2011 Chevrolet Tahoe 4WD V8-5.3L.

charm.li

 

[5StarCustmSolutns]

When i had mine out i just took note of where the tags were positioned on the spring in relation to the body and put them back close-ish.
I don't think it really matters though.

That's what I felt like I did when I put these springs in about 14mos ago, but I went with the moog 80169, which is the z71 spring, and havent been a big fan of the ride ever since... Thought maybe I had them installed incorrectly....

ive learned a little about them since...

 

[5StarCustmSolutns]

There's definitely a top and bottom to mine... I dont necessarily know which is which lol, but one direction they stand perfectly straight, the other has a couple degree lean to it...

Both of mine are right twist(clockwise), and what I had read(or possibly imagined?) was that the ends should both be facing outward, parallel to the axle......which isn't even possible with two right twist springs lol...

So I installed mine with both wire ends pointing towards the driverside...

I got a quote on some really impressive sounding custom springs last week from Custom Spring Specialties in Kansas. Long travel dual (or really more progressive) rate.. I'll ask the engineer Im working with over there tomorrow and follow up..
Spring clocking is a subject I hadnt even thought to ask about yet....

 

[5StarCustmSolutns]

I wouldn't have thought it matters either considering the perchs are flat.
Looking at their (generic?) diagram, the spring end pigtail is located inboard on the upper side.
When the spring is being compressed up (and inwards) the upper outside edge load more, and maybe if the pigtail was on that side,
it might chew into the isolater/perch more easily? At least I can convince myself that's the reason!

googley AI says it matters but then the explanation of why falls flat on its face??


When mine are on smooth concrete floor and I gently rock them the least little bit towards the side of the wire end on bottom and apply very light pressure to the top with my fingetips i can most definitely feel the wire end of the bottom pigtail flex a mm or so before the "other half" of the pigtail loop makes contact with the surface...

when trying the opposite direction I have to lean them much farther just to get the wire end off the ground.. It definetly makes a difference

 

[mikez71]

So I installed mine with both wire ends pointing towards the driverside...

I have a feeling this isn't right. I feel like your driverside? should rotate 180deg.
Sounds like your testing shows there's an inside and an outside to the springs, so they should be mirrored?

I'll take a look at mine and report back...
Welp, I got one spring upside down.. flippin it tomorrow morning.

 

[5StarCustmSolutns]

I have a feeling this isn't right. I feel like your driverside? should rotate 180deg.
Sounds like your testing shows there's an inside and an outside to the springs, so they should be mirrored?

I'll take a look at mine and report back...

Definitely plausible!

I was thinking of giving the most possible resistance to the rear, but I'm curious to hear how yours are.. I haven't tested yet and it'll be hard to notice anyway now as I customized the top mount bracket to recieve the stem of the top of a set of Bilstein 5100's I bought for $40 to drive to FLA and back with...

And when return will be figuing out how to fit 33" Bilstein 8125's under there as either coilovers or shocks to pair with the custom coil springs?? My Arnott's were DONE and I have already pulled compressor

 

[89Suburban]

Subd