SVX Differential pinion part # 38100AA551

Hi guys,

I found a post earlier saying that the pinion gear (with shaft) had it's part number changed from 38100AA170 to 38100AA551. I think the post was about 3 years old. The text in the post was :

Subaruparts.com. Double click on the hypoid gear set (first part on the list) and it takes you to a page where it shows $0 for total and a red X next to quantity, indicating the part may not be available. Notice the bulletin number next to the part number (PT280397). Now type in 38100AA551 in the "add another part" box. Notice the same bulletin number. That bulletin explains that 38100AA170 has been changed to 38100AA551.

So I went ahead and bought a set (Crown and pinion gear - along with other parts = $770).

Problem is, the pinion shaft is slightly different than the origional. At the end of the shaft, the place where the main drive gear goes is further forward that the origional - putting it together it looks the same but I know that the teeth on the inside of the drive gear are only half on the teeth of the shaft.

Has anybody tried this part? I'm ready to put my diff back together - and I really do not want to break it!!

Any help is appriciated - any body from Small Car tried it?