Changing From a 904G to a 727 in a 71 Valiant

have a few questions about swapping a /6 904g with a /6 727. the reason is
that the ring gear on the torque converter on the 904 is bare and I can get
a FREE 225/6 and 727, so I was thinking about just swapping the trans.

I was wondering how possible this is?
Will I need to replace the drive line with a shorter one?
Will the shift linkage bolt right up?


Changing From a 904G to a 727 in a 71 Valiant

 

All you should need is a shorter drive shaft.
Barry A. Lee

 

The 904 and 727 use a different spline on the output shaft so a different
slip yoke will be needed in addition to shortening the drive shaft.
Depending on whether it has a column or console shifter, some pieces of the
shift linkage are different between a 904 and 727 installation. Since the
727 is most likely from a truck, the bottom of the tailhousing may not have
the mounting boss for the console shifter bellcrank support.

 

The 225/727 was pulled out of a dodge dart I think. the car from what I have
been told by the buddy that pulled it the car ran like a bat out of hell(he
just forgot to pull the drive line). it was purchased from an auction to be
scraped.

since it came out of an dodge dart(i think, but it was a car not truck),
would there be that much of a clerance diffrence?

 

No, you'd also need a different slip-yoke. 727 splines are different
than 904 splines.

 

Since the '71 V8 A body car (Dart/Valiant) could be equipped with a 727,
there should be no floor clearance issues but the driveline will still need
shortening and the yoke replaced. The 727 is physically larger and this
affects some of the linkage components.
Most of the /6 727's were from trucks and police/taxi car installations and
these weren't usually A body cars, so it's unlikely it came from a Dart
originally.
Locate the part number stamped in the drivers side pan rail just above the
pan gasket and post it here; I can tell you what it originally came in.