[Firedup6975]

What does the “A” mean on the side of a 78 Trans AM Horn? I do not see any other markings on either of mine that tell you if it’s a high or low horn? Just an upper case A.

Hitmans forum says F note is high and D note is low but that is not marked anywhere on the horns, neither is an H for high or an L for low. Just an A.

[Aus78Formula]

It's a High-A note horn. Original parts listings said this one didn't exist until 80-81 models. High-C, Low-D and Low-F were the others.

[77 Canamman]

1892164 is the original GM part number for the A note horn. It is listed in several parts books preceding 1980.


https://www.ebay.com/itm/25504276982...kAAOSw00Bg43mI

[Aus78Formula]

And for a 78 F model?

[Firedup6975]

Originally Posted by 77 Canamman

1892164 is the original GM part number for the A note horn. It is listed in several parts books preceding 1980.


https://www.ebay.com/itm/25504276982...kAAOSw00Bg43mI

Thank you I have two of these but bench tested they sound different. We sanded them off good to test them at first the original one tested bad no sound so I bought one, that just sounds weird more like a foreign car horn. Then we re tested the original and it worked for a brief second sounding different, but both had those numbers on them. Weird!!

[Aus78Formula]

You're welcome

[Firedup6975]

Originally Posted by Aus78Formula

It's a High-A note horn. Original parts listings said this one didn't exist until 80-81 models. High-C, Low-D and Low-F were the others.

Thank you!

[Aus78Formula]

Does it have a bracket attached or just like Canamman's pic?

[77 Canamman]

The threaded on bracket with nut was a service parts exclusive. I have taken and drilled out the spot welds on both horns, and swapped the original bracket on the new horn.

[Firedup6975]

That horn on e bay is brand new the TA isn’t going to be a concourse resto to pay $75 bucks for one plus $14 shipping. We saw a video on YouTube how to restore them, we took one apart and it was so rusted it had pin holes in the metal.

[Aus78Formula]

The bracket isn't for a Firebird anyway.

[77 Canamman]

Originally Posted by Firedup6975

That horn on e bay is brand new the TA isn’t going to be a concourse resto to pay $75 bucks for one plus $14 shipping. We saw a video on YouTube how to restore them, we took one apart and it was so rusted it had pin holes in the metal.

$89 plus tax for a brand new OEM horn that won't sound like a dying cat is a good deal. Gotta pay if you want to play.

Like I said, you need to reuse your ORIGINAL bracket, as GM wasn't going to offer several service replacement horns.

Never had any luck rebuilding them. They never sound or look right afterwards.

[Firedup6975]

Originally Posted by 77 Canamman

$89 plus tax for a brand new OEM horn that won't sound like a dying cat is a good deal. Gotta pay if you want to play.

Like I said, you need to reuse your ORIGINAL bracket, as GM wasn't going to offer several service replacement horns.

Never had any luck rebuilding them. They never sound or look right afterwards.

Thank you!

[Aus78Formula]

They made a few of these over the years, I'd say there's a few used horns too. Just depends where they've been sitting as to what is now inside them.