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Author Topic: 1ZN7 Optional Axle Ratio RPO  (Read 4345 times)

Offline Gandalf1969

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1ZN7 Optional Axle Ratio RPO
« on: July 20, 2010, 09:50:58 pm »
Anyone know what rear-end this code refers to?  Ratio?  Posi?

Taken direct from the RPO code label on my new '73 SWB 454
"1ZN7 Optional Axle Ratio"

I cannot find a reference to it anywhere on the web.  I noted all my codes started with a "1" so I dropped that and found many of my other codes (such as 1C60 for a/c) came up.  Still nothing for "ZN7" though.

Anyone seen this code?

G.
« Last Edit: July 20, 2010, 09:52:37 pm by Gandalf1969 »
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Offline Irish_Alley

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Re: 1ZN7 Optional Axle Ratio RPO
« Reply #1 on: July 20, 2010, 11:53:56 pm »
cant help you out with the code but can tell you the only way to tell what you have is if you take the cover off and see. code is only what came stock not what/if it has been changed
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If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

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Offline Gandalf1969

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Re: 1ZN7 Optional Axle Ratio RPO
« Reply #2 on: July 25, 2010, 10:33:39 am »
Thanks but I'm more interested in the codes and history - wondering if anyone else has or has seen this code and figuring out what it was from the factory.
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Offline VileZambonie

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Re: 1ZN7 Optional Axle Ratio RPO
« Reply #3 on: July 25, 2010, 06:14:55 pm »
Take a pic of the spid label please. As far as I can see it is a towing package.
« Last Edit: July 25, 2010, 06:16:53 pm by VileZambonie »
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Offline Gandalf1969

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Re: 1ZN7 Optional Axle Ratio RPO
« Reply #4 on: July 25, 2010, 09:05:53 pm »
Attached
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