74 C10 rear end interchange

[oldearl]

Hello All, it's been a while since I logged in here. Lots of great information when I use the search. All of your expertise is very much appreciated.
I am looking to find out what other square body year rear ends fit a 1974 C10 long bed ? Is it 73 to 79 without changing anything ?
It seems the poor old girl is asking for more money to be put into her.
The issue is when I put the auto transmission in gear she sorta locks up until I give her more throttle, it makes a popping noise then moves very slowly . I did jack up the rear so that the wheels were off the ground. I can spin both wheels with the trans in park.
Thanks in advance
Old Earl

 

[Tonimus]

If you're going like for like axle and doing the whole axle, I believe all the square body rear ends are set up the same.

 

[75gmck25]

All of the 1/2 ton square-body rear axles should bolt right in, but the driveshaft yoke may be different. Not a problem if you have a local place that can change it if necessary.

 

[oldearl]

Thanks Tonimus and 75gmck25 for at least answering my questions.
Until the weather clears and the ground dries out all I can do is research and ask about the rear end. I will have to see what is broken inside of the rear when I can pull the cover off.

 

[Ricko1966]

I didn't answer because I do not know enough about interchange on the rearends,to tell someone what is a straight swap. I don't believe the above information is complete enough but do not know for sure. I do know for sure some squares were 10 bolt some were 12 bolt and some were 14 bolt,so even if they bolt in the same you probably need a different length driveshaft. You have to take into account,how many lugs the different rearends have as well as what brakes and backing plates,the backing plates will determine what ebrake cables you can use,there's a lot more than you might think,to swapping rearends. I can take apart a rearend replace all the bearings,etc and put it back together,just as fast or faster than pulling the rearend bolting another one in hooking up e brake and getting the brakes to work. So unless one is really ,really blown up I repair them,even if I have to replace a diff,gears etc.