hi there i have a 1984 nissan 720 king cab 4x2
stock motor just been rebuilt twin webers, cam ect. i was after lsd and and high diff ratios i asked around but someone said that i cant get lsd for that diff,
so first question is what diff is in a nissan/datsun 720 4x2?
what are will be the stock ratios?
and so can i get lsd put in and change the ratios or do i need to change the diff, if so what would be the easyest diff to put in with out cutting the axel down ect. thanks simon

You have a H190. With 3.7 gears if 5spd,

I put a h190 3rd from the 620 (72-79) trucks in both my 85 720s. I was running 30s on both. The 620 used 4.6 for autos and 4.3 for manuals. Its a simple plug in 3rd swap.

Trick is finding 620 parts now adays.

hi thanks for the info so just trying to understand what ur saying ok
what u say is my 84 720 4x2 which is a 5spd should have 3.7 in it now the easyest way to get higher ratios in it is to put a 620 diff in it?
but the 620 diff is that from a 4x4 or 4x2 and what years
but what if i get a 4x4 720 rear diff? thanks

The 720 4wds have C200. They were 4.10s. I put 4.88 in mine to handle 32s.

Yes get a 72-79 620 2wd. Nissan started making 4wds with the 720 model. All the 620 4wds are dealer converted.

I think I ran 4.37 in both my 85 2wds. One was my wifes and my truck. Both trucks had 30s. Gearing was back to stock.

I did blow up 3 H190 rear ends when I was younger. But they were cheap and easy to replace.

Here is one of my old 720s stock and lifted and regeared.

Stock


Lifted 2wd, 2" BL and 3" Jim Conner Arms.