Quote:In the diagram:
* 32601 32601-H7301 HUB-SYNCHRONIZER B
* 32601A 32601-H7300 HUB-SYNCHRONIZER 1ST & 2ND
* 32605B 32601-H9000 HUB-SYNCHRONIZER 3RD & 4TH

Note that 32601A, 32264M, etc. are the diagram markers (not part numbers), so it depends on which diagram you are looking at

I do not know how to tell them apart

In the wiki article are photos along with the two diagrams, and all the PNs. H73 parts are designed for the 4-speeds, and the H90 parts are designed for the 60L 5-speed

4th is direct drive, so there is no gear

So it looks like the synchronizer coupling sleeves are interchangeable. The synchronizer hubs are different for 1st/2nd and 3rd/4th. Any way to identify the difference between these two? And no markings or stamp on the gears. Any way to identify the difference between the gears?

According to the Nissan rebuild manual, gears are as follows:
1st-32230
2nd-32264M
3rd-slides on the front of the Main Shaft (not identified below)
4th-??
OD (5th)-32340
Reverse-32245

Where is 4th??

Yes, their are parts diagrams showing the order of each part

see 60-Series Transmission Parts

FS5W60A

Wanted to ask if Tech Wiki shows how to identify internal parts of my 5 speed transmission. Ready to put this back together and make sure I place everything in the right order.