12 bolt drive line vs 10 bolt driveline - Chevelle Tech
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post #1 of 24 (permalink) Old Nov 24th, 17, 5:28 PM Thread Starter
Chris
 
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12 bolt drive line vs 10 bolt driveline

I'm going to be talking out the 10 bolt rear end in my 70 chevelle and putting in a 12 bolt rear end. Does anyone know if that would require a different length drive line? Thanks a bunch for any info!
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post #2 of 24 (permalink) Old Nov 24th, 17, 5:35 PM
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Re: 12 bolt drive line vs 10 bolt driveline

Should be the same.

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post #3 of 24 (permalink) Old Nov 24th, 17, 5:55 PM Thread Starter
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Thanks. I thought it might be but I wasn't totally sure. Although I may get a custom drive line. I'm not sure what kind of horsepower a stock drive line will take.
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post #4 of 24 (permalink) Old Nov 24th, 17, 7:55 PM
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Re: 12 bolt drive line vs 10 bolt driveline

they can handle a lot until you put sticky tires in the car
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post #5 of 24 (permalink) Old Nov 24th, 17, 8:29 PM
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Re: 12 bolt drive line vs 10 bolt driveline

Unless you're making monster power numbers, why not keep the drive SHAFT and just change/upgrade the u-joints?
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post #6 of 24 (permalink) Old Nov 24th, 17, 10:31 PM
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Re: 12 bolt drive line vs 10 bolt driveline

you should check the yoke to make sure it uses the same u joint. jim

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post #7 of 24 (permalink) Old Nov 24th, 17, 10:37 PM
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Re: 12 bolt drive line vs 10 bolt driveline

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Originally Posted by keithb View Post
they can handle a lot until you put sticky tires in the car


I popped mine in two one night! 350HP and 400 TQ. It was the original.


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post #8 of 24 (permalink) Old Nov 24th, 17, 10:46 PM Thread Starter
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I didn't think about checking the yoke. Thanks for mentioning that. I will definitely install stronger u-joints. The engine is 485 horsepower at the flywheel. Does anybody recommend a good drive shaft supplier?
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post #9 of 24 (permalink) Old Nov 24th, 17, 10:58 PM
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Re: 12 bolt drive line vs 10 bolt driveline

If by different length “driveline” you are referring to the driveshaft, it could be a different length based upon which pinion yoke the rear end has. The U bolt pinion yokes have a more shallow depth than the strap kind. Some HP 12 bolt rear ends could have up to 1330 U joints which have a taller pinion yoke. There could be up to about a half inch of variance. Your transmission yoke *might* be able to take up the slack. You should measure the two in advance to be sure. Here are a couple of examples.
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post #10 of 24 (permalink) Old Nov 24th, 17, 11:36 PM Thread Starter
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Thanks for that information. That's something I didn't realize either. I will have to look at what I've got.
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post #11 of 24 (permalink) Old Nov 25th, 17, 1:02 AM
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Re: 12 bolt drive line vs 10 bolt driveline

Just as a reminder, the left side upper control arm is different between the 12 and 10 bolt.

https://www.lever-family-racing.com/...olt-difference
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post #12 of 24 (permalink) Old Nov 25th, 17, 9:04 AM
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Re: 12 bolt drive line vs 10 bolt driveline

Call wenco driveshafts in Van Nuys Ca if you need one made
They fabbed me up a nice 3" steel one with zerkless Spicers great balance job
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post #13 of 24 (permalink) Old Nov 25th, 17, 9:30 AM
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Re: 12 bolt drive line vs 10 bolt driveline

I used same driveshaft when I swapped from 10 bolt to 12 bolt. 1310 yokes, used non greasable solid u-joints lots of burnouts and hard puls on the street with regular radials and a 600 hp BB before I changed yokes on transmission and rear to 1350 and a 3.5” nitrous ready driveshaft with 1350u-joints from dennys.

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post #14 of 24 (permalink) Old Nov 25th, 17, 9:42 AM
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Re: 12 bolt drive line vs 10 bolt driveline

Quote:
Originally Posted by OO52 View Post
Just as a reminder, the left side upper control arm is different between the 12 and 10 bolt.

https://www.lever-family-racing.com/...olt-difference
Thanks, I did not know that... scratches head..why?
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post #15 of 24 (permalink) Old Nov 25th, 17, 10:56 AM
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Re: 12 bolt drive line vs 10 bolt driveline

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Originally Posted by haughty View Post
Thanks, I did not know that... scratches head..why?
The size of the case is larger on a 12 bolt and interferes with the 10 bolt control arm.

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