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Driveline Angles

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Rebel Machine View Drop Down
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    Posted: Aug/13/2019 at 9:15pm
Took some measurements of the transmission to driveshaft and driveshaft to pinion angles on my '69 AMX. Driveshaft was at zero degrees.

Starting at the rear of the car the pinion is 2.9 degrees up relative to the driveshaft. The transmission is 3 degrees up relative to the driveshaft. From what I've read they need to be parallel, looks like these are within 0.1 degrees. The AMC tech manual says 1 1/2 to 3 1/4 degrees is acceptable with 2 1/4 degrees preferred.

Do these look typical?

Thanks,
-Steve-

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Trader Quote  Post ReplyReply Direct Link To This Post Posted: Aug/13/2019 at 10:08pm
Already quite an extensive post on this subject:
With various opinions including mine.
Have a read, but I think you must have a new transmission mount installed with the angle your referencing. Newer mounts are not necessarily the same dimensions as factory originals.
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rebel Machine Quote  Post ReplyReply Direct Link To This Post Posted: Aug/14/2019 at 6:13am
Found this video explaining driveline vibration and why transmission and pinion angles need to be parallel.

-Steve-



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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mopar_guy Quote  Post ReplyReply Direct Link To This Post Posted: Aug/14/2019 at 6:41am
Originally posted by Rebel Machine Rebel Machine wrote:

Took some measurements of the transmission to driveshaft and driveshaft to pinion angles on my '69 AMX. Driveshaft was at zero degrees.

Starting at the rear of the car the pinion is 2.9 degrees up relative to the driveshaft. The transmission is 3 degrees up relative to the driveshaft. From what I've read they need to be parallel, looks like these are within 0.1 degrees. The AMC tech manual says 1 1/2 to 3 1/4 degrees is acceptable with 2 1/4 degrees preferred.

Do these look typical?

Thanks,
-Steve-



Actually that's perfect but due to spring wrap up you might want to shim the rear down a degree to be about  1.5° - 2° range. That's how mine is setup and I have no vibration.

"Hemilina" My 1973, 5.7 Hemi powered Javelin
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