Axle swap help

[Ifyasquintitsmint]

Looking to offer some labor for axles, the guy states they are a set of 3:73 axles under his '74 K5. The front is a 10 bolt FT 4WD with a set of locking hubs and the rear is a 12 bolt. Will that bolt up fine to my 1984 k10? I have 3.08s under it right now and both are 10 bolts. I can weld new perches if needed.

I have 31" tires and a NV4500 so I was thinking free 3.73 is better than paying a bunch for 4.11s.

 

[Jawzjeep]

They should just fine. 74 should have a 44 not a 10 bolt but doesn't really matter. Are you doing it for the gear change? 4.10- 4.11 comes in a lot of 3/4 ton running gear. Though it means a wheel swap though too of you were to go that route.

I get it though if you got a deal for the axles

 

[PrairieDrifter]

80's 10 bolts will have a 3r u joint. The 70's 12 bolt rear will have a 1310 u joint, I'm guessing the 44 will also be a 1310. Spicer has conversion joints.

Should be fine on spring perches, but shock mounts may be different.

 

[RaisedK5]

And you'll want to use your existing calipers as 74 should have 7/16 banjo bolts and 84 should be 10mm.

 

[Ifyasquintitsmint]

They should just fine. 74 should have a 44 not a 10 bolt but doesn't really matter. Are you doing it for the gear change? 4.10- 4.11 comes in a lot of 3/4 ton running gear. Though it means a wheel swap though too of you were to go that route.

I get it though if you got a deal for the axles

Just don't have the money after an LS/NV4500 swap for the price of 4.11, wheels and tires. Trying to get this thing reliably mobile.

 

[Ifyasquintitsmint]

80's 10 bolts will have a 3r u joint. The 70's 12 bolt rear will have a 1310 u joint, I'm guessing the 44 will also be a 1310. Spicer has conversion joints.

Should be fine on spring perches, but shock mounts may be different.

Didnt think of that, thanks Ill look for the ujoints.

 

[Ifyasquintitsmint]

And you'll want to use your existing calipers as 74 should have 7/16 banjo bolts and 84 should be 10mm.

Can I swap all my brake hardware/rotors over? Everything got replaced before I swapped so the maybe has 50 miles on it.

 

[RaisedK5]

You'd have to swap everything from the spindles out. 74 used the first design small bearing and 84 used the post 75 second design. Stub shafts should be the same but inner axel shafts are different if I recall between an D44 and 10bolt.

 

[Jawzjeep]

And you'll want to use your existing calipers as 74 should have 7/16 banjo bolts and 84 should be 10mm.

I think you can drill out the 7/16 banjo

 

[bucket]

I think you can drill out the 7/16 banjo

Yep. Either drill out the stock hoses to 7/16", swap the hoses, or just swap the calipers.

 

[bucket]

Oh yeah, I forgot. If I had 3.08 ten bolts and came across a pair of 3.73 axles, I'd for sure do the swap. Dealing with the brake hookups and u-joints is much cheaper than buying gears and swapping.

 

[Ifyasquintitsmint]

You'd have to swap everything from the spindles out. 74 used the first design small bearing and 84 used the post 75 second design. Stub shafts should be the same but inner axel shafts are different if I recall between an D44 and 10bolt.

That sounds like a pain

 

[Ifyasquintitsmint]

Oh yeah, I forgot. If I had 3.08 ten bolts and came across a pair of 3.73 axles, I'd for sure do the swap. Dealing with the brake hookups and u-joints is much cheaper than buying gears and swapping.

Basically my thought. An axle swap seems much better than figuring out how to swap gears or paying a shop.

Did find a set of 4.11s two hours away for $600 front and back. Is that worth it?

 

[SquareRoot]

You'd have to swap everything from the spindles out. 74 used the first design small bearing and 84 used the post 75 second design. Stub shafts should be the same but inner axel shafts are different if I recall between an D44 and 10bolt.

 

[RaisedK5]

That sounds like a pain

Same as a brake job just six more nuts to get the spindle off. Besides you'd want to go through any donor axle anyway.