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  #21  
Old 03-27-2014, 05:10 PM
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Originally Posted by subzali View Post
I would put the ARB and 60 series knuckles on the 40.

The way I would do it is to pull the Pig axle apart and pull the diff out. Pull the 40 axle apart and pull that diff out. Swap diffs. Put Pig back together. Then do the 60 series parts swap on the 40 as you reassemble the axle.

Leave the '74 axle out of the picture and leave the questionable 3rd out of the picture. Unless you want to go through the fun exercise of rebuilding the 3rd beforehand, so you know it's good. Then you could swap that into the Pig and maybe not have too many irons in the fire at once. I would still leave the spare axle housing out of the picture though.
If I went down this path, could I put the discs from the '76 Pig onto my '74 housing? Could I use the '74 knuckles and steering arms?
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  #22  
Old 03-27-2014, 07:50 PM
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If I went down this path, could I put the discs from the '76 Pig onto my '74 housing? Could I use the '74 knuckles and steering arms?
Only with a properly functioning replica glove compartment handle
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  #23  
Old 03-28-2014, 09:02 AM
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Only with a properly functioning replica glove compartment handle
Ah... I hope I am well on the path to sourcing said replica!!!
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  #24  
Old 03-28-2014, 11:55 AM
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If I went down this path, could I put the discs from the '76 Pig onto my '74 housing? Could I use the '74 knuckles and steering arms?
'74 knuckles have a smaller bolt pattern than '76 and '78, yes?
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  #25  
Old 03-28-2014, 12:36 PM
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Originally Posted by PabloCruise View Post
If I went down this path, could I put the discs from the '76 Pig onto my '74 housing? Could I use the '74 knuckles and steering arms?

The steering arms are the same. Obviously the 74 knuckle is designed to bolt to a drum backing plate and 76-78 knuckles are designed to bolt to disc backing plates. SOR shows them as different part numbers so they might not be compatible. The spindles are the same though, so some parts interchange
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  #26  
Old 03-28-2014, 04:13 PM
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Quote:
Originally Posted by subzali View Post
The steering arms are the same. Obviously the 74 knuckle is designed to bolt to a drum backing plate and 76-78 knuckles are designed to bolt to disc backing plates. SOR shows them as different part numbers so they might not be compatible. The spindles are the same though, so some parts interchange
Ah, thanks Matt.

I was thinking about this further (easier than actually ) and thinking about getting the '74 axle housing back under the Pig and keep the '78 front housing under the 40... I think it would take a few more steps though.
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  #27  
Old 03-28-2014, 04:46 PM
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small pattern arms are one bolt pattern, large pattern arms (79 and newer) are a different bolt pattern. drum vs disc doesn't appear to make a difference in bolt pattern or arm
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  #28  
Old 03-28-2014, 11:35 PM
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Originally Posted by PabloCruise View Post
'74 knuckles have a smaller bolt pattern than '76 and '78, yes?
No, the larger bolt pattern started in '79 (what Ige said)
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  #29  
Old 04-03-2014, 01:37 PM
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That makes sense, I see the knuckle housings organized by '63 to 9/75, 9/75 to '78 for disc brakes, and then 1/79 to 1/90.

The steering arms go from '58 to 12/78.

So between the 3 front axles (2 disc, 1 drum) plus the extra set of 60 knuckle housings and arms, I should have everything to make 3 disc front axles.
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  #30  
Old 04-03-2014, 07:25 PM
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The thing that makes the pre-disk front end unique is the smaller spindles and matching knuckles. The steering arm bolt pattern (and lower knuckle bearing retainer) was the same, just the stuff you bolt on from the side is smaller.
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