Torque convertor question

[71green go]

I have a 1971 727 Tranny.........question is what torque converter do they use......a balanced one.......or an unbalanced one?.........Is this true there are these two types?......
How do I tell what I have, by the weights welded to converter or not?.......

I found this one locally and am debating if its correct for my 71

Its  a 3000 stall one........is this to much for a motor in the 450hp range?........I have 355 gears

I am a total novice to the tranny issues

steve

[BSB67]

It is not a function of the tranny, its the engine.  If it does not have any weights it is neutral balanced.  What engine is it going behind?

[71green go]

Its going in A 71 charger with 71 440 steel crankshaft motor......I believe the steel cranks take the Unbalanced converters?

is a 10" 3000 stall a good choice?

Thanks!!

[justcruisin]

The picture you posted looks like an 11" converter.
The factory big block converter for 71 is a 12" (11 3/4") but the 11" is a better choice for an engine like yours.
If you have a steel crank 440 then it will be internally balanced and a neutral converter is what you will need, providing it is not a 70/71 HP engine, they are external balance steel crank and are identified by weights on the converter and a ex-centric weight on the balancer. This is providing all is original as people may have changed things over the last 40 odd years.