Driveshaft Differences Between Years?
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Team Owner
Joined: Aug 1999
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SPARTAN
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Driveshaft Differences Between Years?
I'm thinking a new driveshaft is in my future. It'll be easier and probably cheaper in the end than re-balancing the one that's in my car now.
Problem is this:
Looked at Zip's catalog. They list:
"63-70 Driveshaft"
and
"68-79 Driveshaft"
One is for 4-speeds from 68-70 and the other for 4-speeds from 71-80.
What changed?!?! The Muncie didn't and the Borg Warner was pretty much identical to the Muncie. The rear end didn't change until the late 70s. I'm stumped at what the differences could be. And why a different shaft for the automatics? Hmmm.... Tranny length I'm guessing.
Problem is this:
Looked at Zip's catalog. They list:
"63-70 Driveshaft"
and
"68-79 Driveshaft"
One is for 4-speeds from 68-70 and the other for 4-speeds from 71-80.
What changed?!?! The Muncie didn't and the Borg Warner was pretty much identical to the Muncie. The rear end didn't change until the late 70s. I'm stumped at what the differences could be. And why a different shaft for the automatics? Hmmm.... Tranny length I'm guessing.
Le Mans Master
Joined: May 2000
Posts: 6,493
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From: Bloomington MN
Cruise-In II Veteran
Re: Driveshaft Differences Between Years? (ddecart)
There are definitely a few changes. Redvetracr clued me in to these. I swapped a ST-10 M20 from a 74 into my 69 that had an M21 Muncie. After I swapped I needed a driveshaft that was 3/4" shorter and took a wider u-joint to work with the ST-10 rear yoke. I think you have to be careful with differences between both the Muncie and ST-10 (input and output splines and total trans length), and also the M20 and M21 from various years.
AC
AC
Thread Starter
Team Owner
Joined: Aug 1999
Posts: 42,487
Likes: 47
SPARTAN
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St. Jude '03-'04-'05-'06-'07-'08-'09-'10-'11
Re: Driveshaft Differences Between Years? (A C)
Well..the shaft I have now is messed up already. My trans is pre-69. My yoke is correct for '69. My shaft takes a u-joint that doesnt match the yoke (front and rear). I know it's incorrect, but I don't know what to look for.
At $130, I might just order a new one from Zip.
At $130, I might just order a new one from Zip.
