Re: 904 vs 727

[John McEwen <moparrr@xxxxxxx>]

Gary, the 727 was the best automatic transmission of its day.  If it 
was good enough for Hemis and 440s, not to mention all Chrysler high 
performance engines from 1956 on (iron case used until '62 when it 
became the 727), it should certainly be able to handle anything the 
401 can put through it.  Part of the benefits of having such a 
transmission is its durability.  You don't want to have to install 
more than one transmission....

The 904 was a stripped-down TF for low-power use.  Compare the TH400 
with a TH250.  It's the same idea.  It can probably be built to 
handle 375 hp, but for how long?  A good used 727 from a retired C 
body Mopar - without any buildup would probably be better and its 
doubtful if 'rotating mass' will make any measurable difference to 
your times or your wallet.

John

> Well it's time for me to address the tranny issue in my 73 AMX w/401. I have
> heard some negatives on the 727, i.e. heavy, rotating mass etc. The tranny I
> choose will be reworked a bit to handle some extra horsepower. I thought
> about the full manual valve body, but this will be an occasionally  street
> driven car with a handful of weekends up at Lebanon Valley Drag. Can the 904
> be built up to handle the approx. 375  horsepower the builder is predicting?
> Any tips would be greatly appreciated.
>
> Gary N
>
> '73 AMX 401
> '73 AMX 401 Pierre Cardin
> '69 Hurst SC/Rambler