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day late, dollar short, but my 88 runs spools front and rear.  it is NOT advised.  :(  straight line traction is insane.  everything else sucks.  and I mean everything else.

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On 4/7/2021 at 6:44 PM, zomeizter said:

Right on comrades, gonna grab some from rockauto, is the CV style ones not recommended or do they not fit?

Because no one else answered, I’ve got the ZJ CV axles in my ‘91. They’ve been in there a half-dozen years. Fit is just fine although you might want to knock the ABS tone wheels off.

 

In regards to the later shafts with bigger ujoints, I saw a comment on the facepage not long ago about the ujoints themselves being beefier but less material in the yoke to accommodate the bigger caps means it’s easier to damage the yokes if they fail.

This was actually the same justification that I used for going to CVs. I’ve had to replace more axle shafts than I have axle ujoints. It’s one thing if you catch a worn out joint with slop in the needle bearings, but the ujoints I’ve seen actually fail have cracked and blown apart, usually when a spinning wheel suddenly grabs traction, and the shaft yokes coming together usually just shred themselves when that happens. 
BBF77F14-38D6-423C-92EB-4117B1E5A108.jpeg.fca1980ec7a416e1330982383ff2e659.jpeg

CVs are generally stronger, especially when operating at high angles (full steering lock), and are more comfortable because of smoother power delivery. The major disadvantage is the vulnerability of the rubber boot, especially if where you drive brings them into contact with things; sticks, mud, snow and ice, etc. A secondary disadvantage is they’re less serviceable once they wear out, but the more I get into things the less I care about serviceability and the more I care about performance. The CV shafts are also cheaper to replace when the whole shaft fails, unless you’ve got good access to used parts.

For a daily driver or something that mostly sees road use, I would say the CV is the way to go. Off-road I still lean towards CVs, but now you’ve got more specific usage-case arguments.

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7 hours ago, gogmorgo said:

Because no one else answered, I’ve got the ZJ CV axles in my ‘91. They’ve been in there a half-dozen years. Fit is just fine although you might want to knock the ABS tone wheels off.

 

In regards to the later shafts with bigger ujoints, I saw a comment on the facepage not long ago about the ujoints themselves being beefier but less material in the yoke to accommodate the bigger caps means it’s easier to damage the yokes if they fail.

This was actually the same justification that I used for going to CVs. I’ve had to replace more axle shafts than I have axle ujoints. It’s one thing if you catch a worn out joint with slop in the needle bearings, but the ujoints I’ve seen actually fail have cracked and blown apart, usually when a spinning wheel suddenly grabs traction, and the shaft yokes coming together usually just shred themselves when that happens. 
BBF77F14-38D6-423C-92EB-4117B1E5A108.jpeg.fca1980ec7a416e1330982383ff2e659.jpeg

CVs are generally stronger, especially when operating at high angles (full steering lock), and are more comfortable because of smoother power delivery. The major disadvantage is the vulnerability of the rubber boot, especially if where you drive brings them into contact with things; sticks, mud, snow and ice, etc. A secondary disadvantage is they’re less serviceable once they wear out, but the more I get into things the less I care about serviceability and the more I care about performance. The CV shafts are also cheaper to replace when the whole shaft fails, unless you’ve got good access to used parts.

For a daily driver or something that mostly sees road use, I would say the CV is the way to go. Off-road I still lean towards CVs, but now you’ve got more specific usage-case arguments.

Thanks for the info on the CV shafts gog, I remember when I had a ZJ equipped with these, I gave that thing hell for years and never had to repair or replace them. Like I mentioned earlier, I've already ordered some moly shafts, not sure if they're the big joint ones or not but supposedly are guaranteed for life, so some peace of mind there I reckon... 

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22 hours ago, Pete M said:

day late, dollar short, but my 88 runs spools front and rear.  it is NOT advised.  :(  straight line traction is insane.  everything else sucks.  and I mean everything else.

Haha! I hear ya man, I have buddies who own trucks with spools (or Lincoln lockers) and daily drive them, and replace tires often without any complaints at all...F that! I am installing lunch box lockers in the 'manche, but it's purpose will be for fun off road use, and for pulling my heavy azz mower out of the mud hole that I always forget about :D

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I ran a '91 XJ with 5" of lift, 31s and front and rear LockRights for about 10 years. That thing was a beast off road. The traction was incredible and the auto made it real smooth to control. I could do stuff guys with bigger tires and better axles couldn't do. Probably because I could just leasurly cruze through things other people had to hit full throttle. As great as they were off road, the LockRights were miserable on the street. I didn't mind the clicking and banging, but the torque steer was horrible. Accelerate and it pulled one way, decelerate and it goes the other. It was real easy to do accidental lane changes if you weren't paying attention.

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