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Old 08-21-2019, 04:38 PM #1
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Cracked Front Diff Actuator after locker install

Braintrust,

I recently installed an ECGS front 3rd member with ARB air locker. Install went mostly smooth...nothing really to complain about. I did take the actuator off to inspect and resealed it and didn't see anything wrong with it...tbh that wasn't part of the install plan...just wasn't paying attention with what I was unbolting. Anyway, about 1 1/2 later I developed an oil leak and found a hairline crack in the front diff actuator. This seems really odd...I didn't drop the axle nor hit the actuator nor anything for that matter with hammer. I thought maybe I over torqued the bolts but the crack isn't around the bolts so I am stumped. ECGS hadn't seen this but they are sending me a free actuator which is pretty generous since I doubt this has anything to do with the new 3rd member/locker and more likely some dumb thing I did that I can't figure out. But my question for the group is could engaging the front locker (only did this a few times to check for function) cause extra pressure to do this? Any ideas? What dumb thing did I do??? That is aside from using the black fipg instead of the red...will correct this with the replacement. Hopefully, I can pull and replace without having to pull the front diff out.
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Old 08-22-2019, 12:39 AM #2
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Old 08-23-2019, 09:49 PM #3
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Rec'd a replacement (used) actuator from ECGS today! After taking a wire wheel to it to clean it up, I couldn't believe it....almost the same crack that is in mine. I emailed ECGS to see if they have another to send....could this happen for a 3rd time??? Other option is to buy new and or weld this one but I am not sure if that is a good idea....thoughts?

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Old 08-24-2019, 02:08 PM #4
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Could it be a casting mark? Does the crack leak oil.


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