OK guys.. sorry for the long delay.
I have been moving a lot and often in areas with no internet.
Long story short I had to change the whole axle and move it back an inch 😅
First are some pictures of the original 2WD axle third member.
Notice the little drawing that represent a gear (I suppose???) accompanied with a 5?
And here are pictures from the second axle
that came from a 1993 4WD.
Notice the drawing accompanied with a 7 this time.
Anyone know what they mean?
So the third member were very different.
I think the 4WD has limited slip while the 2WD is "normal" gears.
The size obviously were different.
The shafts were also bigger on the 4WD.
The 2WD was not holding oil at all and taking on water at every crossing.
So I made the move and swapped them.
Since the 4WD third member was larger but also longer, the propulsion shaft was now too long.
So decided to take the pin out of the spring leaves and move the axle back 1 inch.
Quite the adventure, in the middle of nowhere 😅!
Working great so far.
This axle is much healthier overall,with basically zero play or noise. Just a small leak from the left shaft that I need to deal with.
Also have to redrill the leaf springs and put the pin back just to be sure it wont move.
And so it definitely feels like it has lower gear ratio with more torque at low speed.
Just speaking from feelings though!
Anyway.. there is the answer to my questions 😁😅