Diff What came stock for rear in 81?

[Kingofwood]

Hi fellow Jeepers>if iam in wrong stop please guide me in wright direction Thanks
I have a 81 CJ5 that I got in transformation in getting a 350. It had a 6 banger in it. My question is what came stock for rear end in these

 

[CJ]

If it is stock it's an AMC20. -->> https://jeep-cj.com/community/threads/cj-axles.43623/#post-395387

We have a great forum you might like that helps new owners with a good run down of all CJ's. -->> https://jeep-cj.com/community/forums/#jeep-cj-comprehensive-database.176

 

[CJ]

Just to add, any posts with a KEYWORD in orange will link to a post with an explanation. Just hover the pointer for a brief description and click for the complete post.

 

[Kingofwood]

Thanks

 

[Kingofwood]

Guss my next question would be if the AMC20 would hold up to the 350 just bombing around the roads thanks

 

[CJ]

If it's stock - no. The axles are two piece and prone to having the hubs spin. There are several kits that replace the 2 piece with 1 piece.
Example -->> https://jeep-cj.com/community/downloads/superior-1-piece-amc20-axle-kit.24

Thread search -->> https://jeep-cj.com/community/search/549/?q=one+piece&o=relevance
-->> https://jeep-cj.com/community/threads/one-piece-20s.40425/
-->> https://jeep-cj.com/community/threads/one-peace-axle.18175/
-->> https://jeep-cj.com/community/threads/one-piece-axle-install.52054/

The axle tubes have been know to spin but a simple welding job can fix that. There are also truss kits available.
The gears are stronger than a Dana 44.

 

[Armyvet25]

Just to add, any posts with a KEYWORD in orange will link to a post with an explanation. Just hover the pointer for a brief description and click for the complete post.

View attachment 77815

Damn, I didn't know that lol

 

[Kingofwood]

Thanks ill figure it out lol

 

[Armyvet25]

Thanks ill figure it out lol

AMC20 is correct, you'll have to figure what gears, could be one of several available

 

[CJ]

AMC20 is correct, you'll have to figure what gears, could be one of several available

Link -->> How to tell what gear ratio is in your CJ.

 

[Kingofwood]

This my 81 CJ5 waiting on one piece axles. cleaned out pumpkin whats everyone putting back in for gear oil front and back thanks

 

[CJ]

I like the color, looks good.
What one piece axle brand did you go with?
The gear oil is good old standard 80w-90 gear oil but if your axle is equipped with a Limited slip diff. you MUST included the required additive.

 

[Kingofwood]

I like the color, looks good.
What one piece axle brand did you go with?
The gear oil is good old standard 80w-90 gear oil but if your axle is equipped with a Limited slip diff. you MUST included the required additive.

I went with the G2 AMC20 Kit. I am Prob going to paint body next winter its a little ruff around the edges
Thanks for the info