5 speed rebuild question

[spappy]

I have a question about rebuilding a 5 speed transmission.  The tranny in question was bought by my son for his '73 620.  We were told it came out of a Z car, but when we went to bolt it in, it was tilting the wrong way, as would a tranny that was bolted up to a NAPS-Z motor.  No problem.  We swapped the front half with one that actually was meant to bolt up to an L-motor.  It ran and drove great for a couple weeks, until a few days ago when his tranny got stuck in 1st/2nd and 3rd/4th.  We pulled it and got it torn apart at a friend's nearby automotive shop.  My friend suggested a rebuild kit, as there is what he considers quite a bit of play in the bearings.  The only problem is-I don't know what this thing came out of.  There was no ID tag between the 2 halves, and all the rebuild kits I have found have 60mm countershaft bearings and ours has a 56mm bearing.  If I knew what it came out of that would make it easier (I hope) to find a rebuild kit for it.  Any ideas?

[datzenmike]

A picture would sure help and perhaps narrow it down. The 62mm bearing was introduced in '85, before that the 56mm was used on all 71B  4 an 5 speeds.

 

The wrong 'tilt' would make it a Z series transmission. So probably an '81-'84 720 or '80-'83 S110 (200sx)

[spappy]

Do want pictures of the case halves, the gears, or all of it?  It's in my friend's shop right now, and I believe he is out of town, so probably Monday would be the soonest I could upload any pix.  I certainly appreciate the help!  Thanx!

[datzenmike]

Both sides of the tail is fine and the front of the case you removed, if you still have it.