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The FJ80 axles are stout, but there are a few things you should think about. The front axles use a low steer steering arm that mounts to the bottom of the knuckle and doesn't allow a lot of clearance for the tie rod. Slee Offroad and OTT make a high steer conversion, but it ain't cheap and I don't think there are a lot of people running them high steer arms yet. With regards to the rear elocker, there have been a few cases where the splines on the axles shafts will get twisted when locked, thus preventing the locker coupler from sliding back to the unlocked position. The only way I have heard of to disengage the locker one the splines get twisted is to pull the locker motor and cut the axle shaft. Then you need to replace the axle shaft and fix any damage you might do to the diff while cutting.

I run a rear 9.5" land cruiser third member and opted for an ARB air locker. In the front I run the high pinion FJ80 third member with the elocker. Good luck with your SAS project. I would also recommend that you go spend A LOT of time reading on Pirate4x4.com and TTORA.com. Both sites have a lot of information that will help you out.
 
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