1963 Impala - 21 Spline Rear Axle Needed - Impala Tech
Transmission & Driveline Transmissions & Differentials

 
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post #1 of 3 (permalink) Old 06-29-2020, 08:31 PM Thread Starter
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Join Date: May 2010
Location: New York
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1963 Impala - 21 Spline Rear Axle Needed

Hey Guys,

I need help in finding a 21 spline rear axle. I need to replace my rear axle on my 1963 Impala and thought it was going to be a 17 spline, but turns out it's 21 splines. Having a very hard time finding a 21 spline rear axle. Any recommendations of where to find one would be much appreciated as I don't want to have to replace the whole rear end because of the # splines. Thanks in advance for you help, I really appreciate it.

Best,
Jrock63Impala
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post #2 of 3 (permalink) Old 07-01-2020, 10:13 AM
 
 
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Quote:
Originally Posted by Jrock63Impala View Post
Hey Guys,

I need help in finding a 21 spline rear axle. I need to replace my rear axle on my 1963 Impala and thought it was going to be a 17 spline, but turns out it's 21 splines. Having a very hard time finding a 21 spline rear axle. Any recommendations of where to find one would be much appreciated as I don't want to have to replace the whole rear end because of the # splines. Thanks in advance for you help, I really appreciate it.

Best,
Jrock63Impala
I might have one. I'll have to check the spline count. These should be the same for 62-64 I believe.
Julian Parker is offline  
post #3 of 3 (permalink) Old 07-01-2020, 11:52 AM
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I believe the only GM axle to use 21 splines was the 7.5". That would not be a stock rear axle for your car. Do you have a drop out center section to your rear axle? If your axle has been changed it may require a different size axle length wise than what would be required for a stock 1963 rear axle.

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