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Old 09-18-2016, 03:45 AM   #1
396C-10
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3 speed manual to T-400 conversion trans yoke?

I have put a T-400 auto trans in place of the 3 speed manual and everything is bolted in but the drive shaft. It is measured, shortened and balanced ready for install. I will need a cross-over u-joint until i can swap the yoke. Does anyone know the part number or ID on this u-joint?
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Old 09-18-2016, 07:26 AM   #2
notsolo
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Re: 3 speed manual to T-400 conversion trans yoke?

I got mine from Denny's Drive shafts.http://www.dennysdriveshaft.com/c142...32_x_3_58.html
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Old 09-18-2016, 02:37 PM   #3
396C-10
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Re: 3 speed manual to T-400 conversion trans yoke?

Thank YOU! This saves a lot of fuss!
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Old 09-19-2016, 09:39 PM   #4
70STOVEBOLT
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Re: 3 speed manual to T-400 conversion trans yoke?

What do you mean swap the yoke? On the diff?
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Old 09-20-2016, 10:56 PM   #5
brad_man_72
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Re: 3 speed manual to T-400 conversion trans yoke?

If it doesn't have the tranny yoke on it, it isn't balanced..
You need to figure out what kind of ujoint the tranny yoke is and what kind of ujoint the driveshaft is (probably 1310) should have had the driveshaft shop put the right weld yoke in the driveshaft that matches the tranny yoke.
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Old 09-21-2016, 12:03 AM   #6
396C-10
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Re: 3 speed manual to T-400 conversion trans yoke?

Quote:
Originally Posted by 70STOVEBOLT View Post
What do you mean swap the yoke? On the diff?
On the trans.... This is a temporary fix for right now.
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Old 09-21-2016, 12:05 AM   #7
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Re: 3 speed manual to T-400 conversion trans yoke?

Quote:
Originally Posted by brad_man_72 View Post
If it doesn't have the tranny yoke on it, it isn't balanced..
You need to figure out what kind of ujoint the tranny yoke is and what kind of ujoint the driveshaft is (probably 1310) should have had the driveshaft shop put the right weld yoke in the driveshaft that matches the tranny yoke.
It has the trans yoke, just a different size. I will jump joint it for now until I figure out a plan.
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Old 09-22-2016, 01:31 PM   #8
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Re: 3 speed manual to T-400 conversion trans yoke?

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Originally Posted by 396C-10 View Post
It has the trans yoke, just a different size. I will jump joint it for now until I figure out a plan.
Just like if you change tires on a wheel you change the balance.
If you change transmission yokes you change the balance of the divshaft even if you use a conversion joint... or even if you use the original joint.
If you're able to measure the ujoint I can give you part numbers or even sell you one. But even if your but dyno doesn't feel a vibration that doesn't mean that you aren't risking damage to the transmission. Its best just to do it right the first time.
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66, stevens drag/ski 18' silouette, 350, 2.02 doublehump heads. comp extreme marine 278 cam, vette 7 fin valve covers, old polished edelbrock intake, velvetdrive, casale v-drive, adj cavitation plate.
28, model a rpu project,
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Old 09-23-2016, 12:31 PM   #9
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Re: 3 speed manual to T-400 conversion trans yoke?

Thank you!
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