Where Were 4.11:1 Rear Differentials Used?

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09-21-2018, 02:22 PM

#21

AllC34Me

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St. Jude Donor '10

Quote:

Originally Posted by chazde3

They were used where people wanted to have some fun!

We measure gas consumption in smiles per gallon, it is a Corvette after all.

That reminds me, David my rear end was a 4:11 when you had it rebuilt correct?

I don't remember Chuck, sorry. My rear end is the 3.73 with the Tremec TKO 600 Five Speed.
I'll have to go back to Bair's and check it. Been a while since we did that. Let me see what I can find. David

Last edited by AllC34Me; 09-21-2018 at 02:24 PM.

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09-21-2018, 03:34 PM

#22

69FASTFUN

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My 69 427 L71 came from the factory with 4:11's and in the 20 years I owned it I bet I didn't put 700 miles on it because of the gearing but it was fun to drive

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09-21-2018, 07:53 PM

#23

EarlyC34me

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Quote:

Originally Posted by Hammerhead Fred

Don't think you could order a 4.11 with a M20.
Best you could get with the standard M20 was a 3.70
OR
You needed a M21 to get a 4.11
You sure you don't have a M21 or a 3.70 rear?

positive

....You needed a M21 to get a 4.11
internet circulated urban legend

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09-21-2018, 11:35 PM

#24

Hammerhead Fred

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Quote:

Originally Posted by EarlyC34me

positive

....You needed a M21 to get a 4.11
internet circulated urban legend

Don't know about the urban legend - I was just going by the documentation published by Chevrolet

Last edited by Hammerhead Fred; 09-22-2018 at 12:06 AM.

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10-21-2018, 06:42 PM

#25

bmans vette

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St. Jude Donor '12-'13, '15- '16-'17-'18-'19, '21

Quote:

Originally Posted by resdoggie

I'm enjoying my 4.11/M21 combo. I only go through a few tanks of gas in the summer so I could not care less about my 10 mpg fuel economy.

Dennis, the rear end is working just fine!

Glad to hear that Mike. Ripping up those Canadian roadways I guess......

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