Is this a small block 727, I believe it is

[dmopar74]

What say ye? I bought a 440 and 727 but think I got the small block trans

 

[413]

Yes small block trans

 

[dmopar74]

Damn it!

 

[413]

BB over small block bell housing features to look for:
Starter is higher
no 7/16" bolt holes down below block level, just 4 1/4-20 for dust cover
Pass side is round, not flat like this one

 

[dmopar74]

Are the internals the same, just the case is different?

 

[RustyRatRod]

Are the internals the same, just the case is different?

Interchangeable yes. Possibly not the same.

 

[Professor Fate]

 

[1WildRT]

First thing I always look for is the Big block has four 1/4-20 bolts at the bottom area of the bell housing to attach the cover...
A small block trans will have two 1/4-20 bolts holt & two 7/16-14 bolt holes for the engine to trans braces...

 

[oldkimmer]

Bb and sb can have 3 or 4 front clutch drums. 3 or 4 planetaries. Other changes is spline size. 65-75 then in 76 up they had a slightly bigger output spline size. 71 up also had a wider front drum bushing. Also 71 had the controlled load front servo. Kim

 

[rbkt65]

#7 is the easiest way to figure it out. BIG IS SMALL(sb), SMALL IS BB(big block)