U joints for dana versus 8 3/4

• Dec 5, 2014

• #1

Ralph Cali

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I have a driveshaft with a Mopar 7290 u joint and will be getting a dana rear end with a 1350 series pinion yoke.

How do I mate these up correctly

Do I just buy a 1350 u joint and have it pressed in ? how do you install and will it fit ?

Thanks for the help as usual..

ralph

 

• Dec 5, 2014

• #2

tallhair

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you can buy a combo universal joints

you will need the width of both and the cup diameter

 

• Dec 5, 2014

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Hemi Rebel

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You could get a special joint, or have a 1350 series end put on your shaft.

- - - Updated - - -

Where in Jersey are you?

 

• Dec 6, 2014

• #4

Coronet 500

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http://www.ringpinion.com/b2c/ProductDetails.aspx?ProdID=6546&Product=DS_U-3140&Brand=Dana_Spicer

http://www.doctordiff.com/1350-to-7290-conversion-u-joint.html

Not hard to find.

 

• Dec 6, 2014

• #5

snakeoil24

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Buy only Dana Spicer Quality, Call DTS for the part. Mate up a true 1350 Joint. The Dana Spicer is still 3x better than off brand product.

 

• Dec 6, 2014

• #6

Ralph Cali

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Hey guys thanks for all the good information

I am in central jersey near the englishtown racetrack

Sounds like the best way to go is have a 1350 put on my current driveshaft since the dana is longer than the 8 3/4 and I may need to have it cut down

how much space should I leave so the I have some play in the system, meaning after measuring the correct dimensions between the yoke and back of the trany example make 1 inch shorter ?

Ralph

 

• Dec 6, 2014

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Hemi Rebel

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You will definitely need to have your driveshaft shortened. Its been a long time since I had mine done but iirc it was 2 to 2.5 inches maybe. Had 1350 joints done at both ends. Only makes sense.

 

• Dec 6, 2014

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Hemi Rebel

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Maybe it was just an inch. You will need to measure

 

• Dec 6, 2014

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747mopar

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I just got a complete TKO tranny kit (tranny, shaft, etc) out of 68 RR (Dana rear) and the driveshaft length was only 1/2" short on my 8 3/4" and I used the mentioned universal joint to mate the two.

 

• Dec 6, 2014

• #10

ply64post

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Difference 8 3/4 and dana

Ralph Cali said:

Hey guys thanks for all the good information

I am in central jersey near the englishtown racetrack

Sounds like the best way to go is have a 1350 put on my current driveshaft since the dana is longer than the 8 3/4 and I may need to have it cut down

how much space should I leave so the I have some play in the system, meaning after measuring the correct dimensions between the yoke and back of the trany example make 1 inch shorter ?


Ralph

Click to expand...

I am not sure exactly what car you are working on but, this would work for all applications.
This should give you the right length difference 8 3/4 [51.50"] and dana [50.39"] which would make the shaft 1.11" shorter with a dana. So regardless the length that would be the difference.
Information is from 69 parts book and the specs are for a 69 RR or GTX.

Jeff


View attachment 225519

 

• Dec 6, 2014

• #11

kelly

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Hello,
I'm also putting a dana under my 62 Dart. It has a 8 1/4 under it know. So will the drive shaft work with the dana?
Thanks

 

• Dec 7, 2014

• #12

ply64post

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Driveshaft

kelly said:

Hello,
I'm also putting a dana under my 62 Dart. It has a 8 1/4 under it know. So will the drive shaft work with the dana?
Thanks

Click to expand...

As you can see in the chart there is 1.78" difference between the dana and the 8 1/4.
If it has a 8 1/4 then just shorten the 1.78".
Make sure you use the proper u-joint.

The measurement [c] is taken from the housing tube center line to the pinion housing as in the chart.



http://www.ringpinion.com/b2c/ProductDetails.aspx?ProdID=6546&Product=DS_U-3140&Brand=Dana_Spicer

http://www.doctordiff.com/1350-to-7290-conversion-u-joint.html


View attachment 225620

 

Last edited: Dec 7, 2014

• Dec 7, 2014

• #13

2059

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as said earlier, have a driveshaft/clutch shop shorten the shaft and at that point put on the 1350 series yoke. If it were me, (and you can afford it) I would have the front changed also. No sense in having a small diameter, lighter duty u-joint in a heavy duty setup.