open_circuit previously posted:
"Furthermore, because going to 4.57 would change the ring gear size, if I understand correctly, I think I'll lose my limited slip rear diff. I am aware of air and electronic lockers as options. I assume something like this https://www.justdifferentials.com/Da.../tt913a592.htm
is a viable replacement? I think this may be what Paul runs in his LJ, though i'm not sure of his gearing. I'm considering whether an LSD would be better for general driving and towing than a selectable locker. D44 rear, D30 front on the LJ."
I am not 100% familiar with 'modern' D44s, but yes, the carrier break 3.92....Going from 3.73 to any gearing numerically higher than 3.92 (say 4.57), then yes, the ring gear changes and it will not bolt up to the 3.73 carrier (and in you case, that carrier is a limited slip). So, the short answer is yes, you'll have to figure out how you want to handle traction devices as well. Its may or may not be worth mentioning, and not sure if it fully applies to TJ era D44, but there are some aftermarket ring gears for D44s that were specifically to deal with this issue. IIRC, the issue is not so much with the diameter of the ring gear, but rather the thickness changes. So there used to be (and maybe still are) D44 'thick' and 'thin' ring gears for the different carrier breaks that could be used, or spacers can been used to make a 'thin' gear work with a 'thick' gear carrier ....so, it might take a very knowledgeable gear shop to help you with that, but if you are interested to keep your limited slips, it is a possible option...is it the best option, up to you......if it were me, I'd use the opportunity to get a selectable locker - at least in the rear. I guess everyone has their preferred set-ups and experience and type of trail they drive, but I think 1 rear locker is more traction that 2 limited slips. Personally, I prefer the Eaton e-locker over the air activated lockers as the air hoses are just a bit of a hassle, and you also need a compressor. The Ox is probably the most bullet proof, but the actuator options can be a little finicky as well.