Rear diff breather was dunked - Toyota FJ Cruiser Forum
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post #1 of 20 (permalink) Old 03-23-2015, 12:31 PM Thread Starter
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Rear diff breather was dunked

Lately we've had a lot of rain in my area and while I was out yesterday with a friend I attempted to cross a creek on a dirt road. I know the road well as I grew up on it, but it was a little too deep so I backed out. I could hear my exhaust under water so I know it was at least that high. Then I realized my rear diff breather was also under water. It lasted less than a minute, but now I'm worried about it. Should I be?
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post #2 of 20 (permalink) Old 03-23-2015, 12:44 PM
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Re: Rear diff breather was dunked

I don't think you have to be, but I'm no expert...



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post #3 of 20 (permalink) Old 03-23-2015, 12:47 PM
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Re: Rear diff breather was dunked

Do the Scuba mod on this web site. IF you are not sure a couple of quarts of diff lube is cheap insurance. Way cheaper than a rebuild. After every trip that i go in the water a lot i change everything. About 60$ in synthetic lube piece of mind priceless.
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post #4 of 20 (permalink) Old 03-23-2015, 12:49 PM Thread Starter
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Re: Rear diff breather was dunked

Scuba mod is actually next on my list. Just have to find time to do it.
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post #5 of 20 (permalink) Old 03-23-2015, 01:47 PM
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Re: Rear diff breather was dunked

Pull the diff fill plug and dip your finger in there. If the fluid looks anything other than normal I would change it.
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post #6 of 20 (permalink) Old 03-23-2015, 01:50 PM
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Re: Rear diff breather was dunked

You are probably fine.
If worried do a fluid swap. Less than $40 for 3 qts of synthetic 75w90 and two washers. Piece of mind.
Then Do Scuba Mod sooner rather than later.
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post #7 of 20 (permalink) Old 03-23-2015, 02:00 PM
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Re: Rear diff breather was dunked

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Then I realized my rear diff breather was also under water. It lasted less than a minute, but now I'm worried about it. Should I be?
What year is your truck, how many miles? Odds are you're probably due for a diff fluid change anyway. The breather is designed to keep water out, but the scuba mod wouldn't exist if the diff breathers weren't ridiculously cheap and flimsy parts.

If your truck is 3+ years old with 30K+ miles, go ahead and do the Scuba mod then fluid swap.
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post #8 of 20 (permalink) Old 03-23-2015, 02:03 PM
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Re: Rear diff breather was dunked

I agree. Probably fine. I'd only be concerned if you get it off of there and you can suck air into it...meaning the rubber seal or spring inside it has failed / seized. Probably is fine. Only time to be concerned is if you get stuck and it site... then it may infiltrate the axle seals.

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post #9 of 20 (permalink) Old 03-23-2015, 02:22 PM Thread Starter
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Quote:
jimmy-buffett previously said: View Post
What year is your truck, how many miles? Odds are you're probably due for a diff fluid change anyway. The breather is designed to keep water out, but the scuba mod wouldn't exist if the diff breathers weren't ridiculously cheap and flimsy parts.

If your truck is 3+ years old with 30K+ miles, go ahead and do the Scuba mod then fluid swap.
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post #10 of 20 (permalink) Old 03-23-2015, 02:22 PM
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Re: Rear diff breather was dunked

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Serenity Now previously said: View Post
Pull the diff fill plug and dip your finger in there. If the fluid looks anything other than normal I would change it.
+1

I'd be surprised if you took in any water, but the rear diff is very easy to get to and check. A drain and refill is also quick and easy.

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