727 or lock up 904

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coyote42

coyote42

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Hi, I am looking for advice and opinions, dangerous I know. I have a 727 and lock up 904 out of a 1991 ram150. My project is a 67 Cuda fb , 340ci around 350hp when done, I have collected sure grip center sections from 2.94, 3.23, 3.55, 3.91 gears. I plan to drive it a lot. Some long cruises to shows, some track time but not much. I know the 727 is stouter but I know the 904 is lighter and saves some HP. I like the idea of the lock up converter I could activate with a switch to save some RPM on highway runs but I would also like to do a reverse manual valve body. It is fun to drive that way, had it on other cars. Car is in paint shop now, planning ahead for assembly. Thanks in advance.
 
I would go for the lockup and the 3.55 gear.
 
Didn't they have problems with the trans input shaft stripping with the lockup converters? I had a 77 Volaire that had that problem, almost made it to work when the tranny quit. Had to have car towed to have it fixed. Maybe a tranny guy would have more info and add some info.
 
So you have the a500 overdrive trans or a 904 with lock up converter? If its a 91 a500 overdrive trans it also has lockup converter as well. I wouldn't be afraid to run the that behind a 340, going to need some fab work on tunnel and trans mount but the overdrive would be nice. Not sure if there is rmvb for the od trans.
 
Last edited:
gtsdude said:
So you have the a500 overdrive trans or a 904 with lock up converter? If its a 91 a500 overdrive trans it also has lockup converter as well. I wouldn't be afraid to run the that behind a 340, going to need some fab work on tunnel and trans mount but the overdrive would be nice. Not sure if there is rmvb for the od trans.
Click to expand...
Just a 904 w/lock up converter. Not o/d.
 
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