I'll admit I have seen a couple of A833 OD trannys that broke. The part that failed was the aluminum case.

While most of the OD units have the aluminum case there are a few that came with the castiron case. Internally the OD and non-OD should be equally as strong, however the aluminum case does not seem to hold up as well. IMO the A833 and A833OD units were one of the strongest factory 4 speeds built.

As it happens, the OD 833 for my 57 Plymouth has the iron case. Becasue I have the parts (and I just enjoy building 4 speeds) I am going to build a spare A833 OD just to have around. Basically what I'm going to do is swapt the OD parts into a spare Iron case I have laying around.

For the spare tranny I'm using a case that uses the small input bearing and 3 3/4" pilot bearing retainer bolt circle. The beauty of this is I can use either the standard small (3.35") pilot bearing retainer, the C97619 (3.80") medium retainer or the C97728 (4.125") big beraing retainer. This will allow the tranny to fit any of the standard 4 speed bellhousing (big or small bolck) that Chrysler used.

reddog74usa. Just order a standard clutch and presure plate for a late 60s early 70s small block.