I have a 9" Ford rear end/third member and it has a larger longer pinion shield with a rubber snubber on it.  It is larger/longer than the one on my 57, which does not have a snubber.  It looks like it is stepped up to miss the drive shaft.  I think the 3rd member is from a 57, it is a 3.89 ratio.  I can't count the splines, I assume there are 28.  Do some 57's have different pinion shields? or is this not a 57 passenmger car differential?

Paul J. - '57 E Code

Paul - I don't think the pinion snubber showed up until the "muscle car" years. More likely mid to late 60's parts?

 
 Steve Metzger       Tucson, Arizona

Thanks Steve,

I'll have to search my Ford parts CD some more. I found the part numbers listed for 57's, but maybe they were used later too. Someone could have added it, but this third member looks like it's been together for a long time.

Paul J. - '57 E Code