Mid year rear spring with unusual emblem

[Michael G.]

Let me start my saying I've restored numerous original rear springs over the years but have come across an emblem never wittnessed. Currently am restoring a customers original mid year ('67) rear spring. During the restoration process came across an emblem embossed on at least 3 of the leaves. From what I can interpute letters read "GMU" which are raised on side of leaves. Wow....what's this all about? Anyone see these letters before?

[Monte M.]

Re: Mid year rear spring with unusual emblem

Hey Mike,
Been a while. I picked this up off another forum. Thought it might be a start.

"Title: Re: Leaf Spring code?
Post by: JohnZ on February 11, 2013, 11:37:29 AM

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Many midyear Corvette rear leaf springs have "GLS" debossed on the edge of the leaves, and our research with Rockwell and Ontario Steel Products (who manufactured the springs) disclosed that the "GLS" stood for Great Lakes Steel, who supplied the SAE 5140 strip stock the springs were made from. The "GMU" on Camaro leaf springs must identify a different steel supplier to Chevrolet-Livonia Spring & Bumper, who manufactured the Camaro springs."

Monte

[Terry M.]

Re: Mid year rear spring with unusual emblem

Let me start my saying I've restored numerous original rear springs over the years but have come across an emblem never wittnessed. Currently am restoring a customers original mid year ('67) rear spring. During the restoration process came across an emblem embossed on at least 3 of the leaves. From what I can interpute letters read "GMU" which are raised on side of leaves. Wow....what's this all about? Anyone see these letters before?

I have seen more than a few GMU on 1970-72 Corvettes

[Alan D.]

Re: Mid year rear spring with unusual emblem

Recall a discussion on this back in 07, also believe the Restorer had an article on the subject however have no idea what issue. Below is an original 64 spring.

[Michael G.]

Re: Mid year rear spring with unusual emblem

So what do initials GMU stand for?

[Wayne M.]

Re: Mid year rear spring with unusual emblem

Here's the GLS, off a '65 std suspension.



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