But for this question, I didn't even need to reference it to give the OP correct information because I've filled many differentials over the years. Well Dude, yes, I own a FSM and I use it all the time. A lot of time it won't let the fluid go back down the breather due to air bubbles and then it will just come out next time the front diff gets warmed up. I would recommend checking your "check" valve that's on the end of the breather. To the OP, a lot of people experience this after doing service. But have you ever opened our 4runner's service books? If you fill the front diff to the bottom of the threads of the fill hole, you have over filled it. Not trying to call you out for giving false information, err wait, I guess I am. I refilled the the differential and have yet to drive the vehicle since the spew today I will be traveling about 350 miles so we'll have to see if it happens again. Thanks for the comment, will check the breather tube. I was in the garage which is ever so slightly inclined toward the street for water drainage, but never has it been too much to impact any fluid filling or fluid checking. But, since you noticed this after renewing your fluid, I'm leaning towards the possibility you overfilled it due to not being on level ground. You might want to pull the breather and check that air moves through it easily. Due to the excessive pressure that was allowed to build up, oil then squirted out along with the excess air pressure. If your breather got a little stuck, the pressure built up until it overcame the stuck breather valve. OP, you either overfilled your differential possibly because you were at a slant with your rear end lower than your front end or your breather isn't working properly. If you're not on level ground, then you run a chance of being over or under filled depending on which way you are slanted. When you are pumping in new oil and you see the oil start to pour out of the hole, you know you are full.
2004 DENALI BAD FRONT FMDIFF MANUAL
I've never experienced this.Īny time you fill a differential, transfer case, or manual transmission, you fill it to the bottom of the threads of the fill hole. Sorry to disagree, but I'm going to say Not Normal. Mine hasn't done it since the first and only time. I believe the proper level is slightly below the fill hole on the front diff. Mine did it the first time I used 4x4 after the oil change and others have had the same experience.
It seems to be overfilling the front diff and as the gear oil warms it expands and finds it's way out the breather. If you search you should be able to find related threads.
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