Boss rear axle choices

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cobra94svt

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I know that the boss cars were standard traction lock 3.91 rears, but were there options? Was the 4.11 an option for these cars?

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cobra94svt, the info I have is that the 71 Boss had the 3.91 gear standard as you posted with no optional ratios offered. The 4.11 was an optional gear over the 3.91 with the Drag Pack 429 Mustangs. If you had a 429 Torino/Cyclone with the Drag Pack, there was an optional 4.30 gear over the standard 3.91.

Edit..checked my 72 info and same thing. The "R" HO had a 3.91 gear standard with no optional gear available.

 
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yancy55

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As an original owner, I ordered my Boss on Christmas Eve 1970. I can state with absolute certainty that I was not provided with any other ratio options other than the 3.91....

 

cobra94svt

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The Ford research letter list it with "optional 4.11 locking rear". But been told they are wrong sometimes. The invoice says optional locking rear.

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cobra94svt, the info I have is that the 71 Boss had the 3.91 gear standard as you posted with no optional ratios offered. The 4.11 was an optional gear over the 3.91 with the Drag Pack 429 Mustangs. If you had a 429 Torino/Cyclone with the Drag Pack, there was an optional 4.30 gear over the standard 3.91.

Edit..checked my 72 info and same thing. The "R" HO had a 3.91 gear standard with no optional gear available.
Completely concur with Steve (Secluff) and others declaring same. No BOSS 351 cars ever factory equipped with ANY rear axle other than the 3.91 Traction Lock. This is straight from actual production data. Those reports you mention are commonly incorrect.

Ray

 
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