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automatic transmission
https://slantsix.org/forum/viewtopic.php?t=57065		 Page 1 of 1
Author:  eastvan54 [ Sun Feb 08, 2015 8:01 pm ]
Post subject:  automatic transmission
got me a 225 slant 6 - a904 automatic - the trannny takes some 30% of engine power to operate the tranny - am i right in this saying? - thinking of the standard a833 - though with my bad knees i might be stuck with the a904 - there is the a500 - with adaptability to the slant6 - the a904 even with upgrades i am not too sure - the car is a driver with a bit of attitude
Author:  SlantSixDan [ Sun Feb 08, 2015 9:19 pm ]
Post subject:  Re: automatic transmission
Quote:
got me a 225 slant 6 - a904 automatic
In what kind of vehicle, with how much wear and tear on it?
Quote:
the trannny takes some 30% of engine power to operate the tranny - am i right in this saying?
No, where did this number come from? The A904 takes vastly less than 30% of the engine power to operate. If the transmission were consuming 30% of the engine's power, it would get so hot it would melt into a heap of smoking slag.
Quote:
thinking of the standard a833
Big, expensive, difficult swap. Take you a long time to break even on it.
Quote:
there is the a500
What makes you think it takes less power to operate than an A904 which is identical except for the lack of the 4th gear?
Quote:
with adaptability to the slant6
Kinda-sorta. It can be done, but you're looking at floor pan mods, crossmember mods, custom driveshaft, custom controller...this is another big, expensive, involved swap.
Quote:
the a904 even with upgrades i am not too sure
Not too sure about what, exactly? The A904 is an excellent, very efficient transmission.
Author:  eastvan54 [ Sun Feb 08, 2015 10:02 pm ]
Post subject: 
have a 75 2 door dart swinger - doing a restoration - what about the upgrades for the a904 - i am sure that perhaps adding or better yet improving the tranny would be the best way to go -
Author:  SlantSixDan [ Sun Feb 08, 2015 10:11 pm ]
Post subject: 
What improvements are you trying for...? What do you want it to do that it doesn't presently do, or not-do that it presently does, or do differently?
Author:  Reed [ Sun Feb 08, 2015 11:10 pm ]
Post subject: 
For a daily driven 75 Dart the only modifications I recommend being made during a full rebuild are (1) make sure the 904 has part throttle kick down and (2) install a shift kit. Otherwise, leave it alone. Like Dan said, the 904 is a VERY well designed and durable transmission.
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