Supposed to have been pulled from an '81 pick up. Does it being a truck transmission make it a difficult swap into an A body? Do I need to keep looking for an A body 904?
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| ID this trans, 904 or some derivative? https://slantsix.org/forum/viewtopic.php?f=20&t=63551 |
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| Author: | drgonzo [ Thu Apr 25, 2019 9:01 am ] |
| Post subject: | ID this trans, 904 or some derivative? |
Supposed to have been pulled from an '81 pick up. Does it being a truck transmission make it a difficult swap into an A body? Do I need to keep looking for an A body 904?
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| Author: | Dart270 [ Thu Apr 25, 2019 10:50 am ] |
| Post subject: | Re: ID this trans, 904 or some derivative? |
Yes, looks like a Slant 6 904. Should be a direct swap to any A-body. Assume you know about large/small crank hub/pilot hole and converter match up... Lou |
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| Author: | drgonzo [ Thu Apr 25, 2019 10:53 am ] |
| Post subject: | Re: ID this trans, 904 or some derivative? |
Yes I am aware of the input shaft sizes and such. That is one reason for the swap. So does it matter that it came from a truck? Still a direct swap? I have a '63 Dart with push button 904. I am not using a 63 crank. |
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| Author: | Reed [ Thu Apr 25, 2019 1:06 pm ] |
| Post subject: | Re: ID this trans, 904 or some derivative? |
The 81 904 will likely have more clutches than a car slant, a wide-ratio gearset, and it will be lockup. None of these are really a bad thing unless you are racing and don't like the larger RPM drop between 1st and second gears. |
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| Author: | drgonzo [ Thu Apr 25, 2019 1:14 pm ] |
| Post subject: | Re: ID this trans, 904 or some derivative? |
The numbers are: 4058383 http://mymopar.com/downloads/transguide.pdf |
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| Author: | drgonzo [ Thu Apr 25, 2019 1:38 pm ] |
| Post subject: | Re: ID this trans, 904 or some derivative? |
Is the rpm drop that significant? I am trying to build a relatively fast car so maybe I need to keep looking. |
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| Author: | Badvert65 [ Thu Apr 25, 2019 1:55 pm ] |
| Post subject: | Re: ID this trans, 904 or some derivative? |
According to Tom Hand's Torqueflite book, 4058383 is 1981 Dodge truck, 225, 904, wide ratio gear set, lock up converter. |
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| Author: | Reed [ Thu Apr 25, 2019 2:16 pm ] |
| Post subject: | Re: ID this trans, 904 or some derivative? |
drgonzo wrote: Is the rpm drop that significant? I am trying to build a relatively fast car so maybe I need to keep looking. Third gear is 1:1 in both the older narrow gear ratio and the later wide ratio gearset. Wide ratio- 2.74, 1.54, 1 Close ratio- 2.45, 1.45, 1 Your can figure out what that means for your gearing and acceleration and what it means in relation to your power band. |
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| Author: | drgonzo [ Thu Apr 25, 2019 3:23 pm ] |
| Post subject: | Re: ID this trans, 904 or some derivative? |
I'm going to keep looking. |
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