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can a 65 automatic use the tail of a newer 904?
https://slantsix.org/forum/viewtopic.php?t=43927
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Author:  ppsi [ Mon Mar 07, 2011 5:05 pm ]
Post subject:  can a 65 automatic use the tail of a newer 904?

I have the old trunion style transmission in my Dart. I also have a slant 904 in a storage building that I've not looked at in a while. I am wondering if I could remove the tail from the newer 904 and put it on my current transmission and get a new drive shaft made so I can use conventional style universal joints.
I might as well totally expose my ignorance by asking is it possible the newer style 904 has a different internal gearing for the final drive than my 65. I figure both are 1:1 but my Dart revs high and it has an 8 1/4 with low 300 ratio (323?) gearing. It isn't slipping but just revs at 3000+ when going 55 mph.

Author:  bigslant6fan [ Mon Mar 07, 2011 5:08 pm ]
Post subject:  .

No, It's completly different

Author:  Joshie225 [ Mon Mar 07, 2011 7:51 pm ]
Post subject: 

Not only doesn't it work, all A904 transmissions have the same 1:1 high gear ratio.

Author:  Charrlie_S [ Tue Mar 08, 2011 5:24 am ]
Post subject: 

PPSI, You can modify your drive shaft like this.
http://www.earlycuda.org/tech/ujoint.htm

Author:  Rug_Trucker [ Tue Mar 08, 2011 3:46 pm ]
Post subject: 

3:23's= 3000@ 70mph or somewhere near that. Depending on tire height.

Author:  ppsi [ Tue Mar 08, 2011 6:38 pm ]
Post subject: 

Quote:
3:23's= 3000@ 70mph or somewhere near that. Depending on tire height.
Maybe I need to bring a tach on my next trip. I've converted the car to 15" wheels which should slow the engine down even more????
Thanks-Howard

Author:  ppsi [ Sat Mar 12, 2011 4:28 pm ]
Post subject: 

I could put this transmission in this Dart but I am about to put a console in it from a cable shift car. Is there a conversion kit to go from cable to linkage?
Thanks
Howard

Author:  Joshie225 [ Sat Mar 12, 2011 4:34 pm ]
Post subject: 

Quote:
I could put this transmission in this Dart but I am about to put a console in it from a cable shift car. Is there a conversion kit to go from cable to linkage?
Thanks
Howard
Use the '66 stuff to make it rod shifted.

Author:  Rug_Trucker [ Sat Mar 12, 2011 7:16 pm ]
Post subject: 

65 tranny is a 1 year only that was cable shifted. No trunion, and can be push started!

Author:  Charrlie_S [ Sun Mar 13, 2011 4:52 am ]
Post subject: 

Quote:
65 tranny is a 1 year only that was cable shifted. No trunion, and can be push started!
65 tranny DOES have a trunion. It is one year only, because of a different valve body. A 64 older push button trans can be converted to a 65 trans, by changing the valve body (using a 65 VB), to work with the non push button cable shifter.

66 trans uses "mechanical" shift linkage, has no trunion, and cannot be push started. It has a different speedo connection.

67 trans is the same as 66,

68 trans had a major change, due to using a larger input shaft, and a larger pilot "nub" on the converter. Because of this change the 68 and later trans/converter cannot be used with a 67 and older engine.

Edit: corrected info about speedo connection.

Author:  Charrlie_S [ Sun Mar 13, 2011 5:02 am ]
Post subject: 

Quote:
I could put this transmission in this Dart but I am about to put a console in it from a cable shift car. Is there a conversion kit to go from cable to linkage?
Thanks
Howard
There is a conversion kit, but it is for the pushbutton cable shifter to later mechanical shifted trans. Very expensive. I see they now have a kit for the non push button shifters, that is not too pricey.
http://www.imperialservices.net/Aparts.html
Scroll down.

Author:  slantzilla [ Sun Mar 13, 2011 7:31 am ]
Post subject: 

My trans guy converts trunnion tails to slip yoke all the time. You have to change a lot of stuff though, it's not a simple thing.

Author:  Charrlie_S [ Sun Mar 13, 2011 9:42 am ]
Post subject: 

Quote:
My trans guy converts trunnion tails to slip yoke all the time. You have to change a lot of stuff though, it's not a simple thing.
In my opinion, that is not cost effictive. Yes it can be done, but that doesn't mean it should be done. Easier/cheaper to either change the complete trans to a newer one, or do the driveshaft conversion.

Author:  slantzilla [ Sun Mar 13, 2011 12:41 pm ]
Post subject: 

Some guys just want to retain the PB/cable shift.

I don't think he charges a whole lot more than just s standard rebuild price either.

Hell Charlie, not everyone is like us Slant racers. Some people actually have too much money. :lol: :lol: :lol: :lol: :lol:

Author:  SlantSixDan [ Sun Mar 13, 2011 2:21 pm ]
Post subject: 

Quote:
Some guys just want to retain the PB/cable shift.
Solution: convert the driveshaft.

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