Driveshaft length - Vintage Mustang Forums
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post #1 of 7 (permalink) Old 07-07-2019, 08:00 AM Thread Starter
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Driveshaft length

Hi all !

Anyone have info how long is '66 289 Mustang driveshaft with T10 transmission and 8" rear? I need to order new but can't get to car to measure length. I think it is 50-51" inches, does that one inch difference matter?

Thanks !



Mustang HT 289/302 4-speed 1966
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post #2 of 7 (permalink) Old 07-07-2019, 08:51 AM
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Measure it before ordering. You surely do not want to have the wrong one shipped to Finland and have to return it because it won’t fit. Been there done that, and I’m in the states and it was a pain. Here is a graph:

And a measuring guide:

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post #3 of 7 (permalink) Old 07-07-2019, 09:05 AM Thread Starter
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Thank you coupster, helped a lot. I think mine has that 50-25/32 long. Going to measure it for sure when I get to car.

Mustang HT 289/302 4-speed 1966
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post #4 of 7 (permalink) Old 07-07-2019, 09:17 AM
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I would measure it however the company you purchase the new one from tells you. ALso, consider having your old one rebuilt by a driveshaft guy. Very cheap and they will build it to any length and tell you how to measure also.
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post #5 of 7 (permalink) Old 07-07-2019, 09:59 AM
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Approximately 50.50”, I think it’s closer to 50.25”. I’m running a aluminum driveshaft out of a 94 V6 2WD Explorer. Just about a perfect fit and it uses 1310 universal joints. I know you’re in Finland but this may help you looking for driveshaft out of another vehicle. I believe there was a Isuzu truck driveshaft that fit as well. If you’re not aware they make combination universal joints to adapt 2 different yoke sizes. Happy hunting
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post #6 of 7 (permalink) Old 07-07-2019, 10:03 AM
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I was going to suggest the OP consider getting an aluminum Explorer shaft and having the length adjusted locally if needed

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post #7 of 7 (permalink) Old 07-07-2019, 11:54 AM
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Factory length on the 66 289/ 4speed driveshaft was 50 25/32". Has those tiny little 1260 series U-joints. If you're having one made and plan on any type of performance driving, I'd upgrade to 1310 joints.


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