28 DB Drive gear (Ring gear) for differential

I am attempting to give what I thought was a '28 differential to a fellow member. Looking at the gear here is what I found:

Looking at the gear side, as if looking at a dinner plate: RC 36379 then one fastener over 49 11 14 1/2 DB (DB being a usual casting to show factory parts)

Looking at the gear side from outside the gear looking in: 413 then several inches over 20

Attached is a scan of the parts book page which shows the pinion gear should be part 40343. None of the numbers line up with 36379

What I have appears to be DB but what? I do not have a part number on the pinion I have as it will require some disassembly. It should be 40344 per parts book but who knows?

Can ideas to solve this mystery?

Paul

Can you count the teeth on both ring gear and pinion?

According to the Republic Catalog "S", the following is for the '28 Std 6: set 30345 (30343 and 30344 ring and pinion) is 49-11. Set 202489 (36865 and 202441 ring and pinion) is 52-11. The "speed set" is 49-13. And there is another set 51-10. Ring gear ID 6.375", OD 10.5".

The '28 Victory 6 , 130, 131 to car M26246 with Timken bearings used either set 35754 (36379 and 36380) at 49-11 or set 33707 (34666 and 34679) at 49-13. Same dimensions as above.

Cars M26246 up used ball bearings and had the same options as Std 6.

OK, so it looks like you have set 35754 at 49-11. It is out of one of those cars shown above. The 49 11 is the teeth count. 14 1/2 = what? Check it has Timken bearings.

Tgears are as follows;

49:13 -128 withh 19" wheels 3.75 to 1 fast four

49:11 - 130/140 with 19" wheels 4.45 to 1 Stanard and Victory Six

50:11- as above with 21" wheels 4.7 to 1

47:11 _128 with 21" wheels fast four 4.23 to 1

The 141/2 degrees is the gear cut of the teath.

51:10 replacment gear for 21" wheels

regards Bob