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#3444546 - 08/03/14 09:14 AM There may be water in my Diff
Realtech214 Offline

Registered: 02/01/13
Posts: 643
Loc: Florida
Hey all, Did some mild off roading in the silverado this weekend and there was quite a bit of driving through water. deep enough to splash over the hood a little bit. Think any got into the diff? It dosnt leak at all but im slightly concerned. It has been about 15K miles since I changed the fluid. I have a gallon of 85W140 layin around but it call for 75w90 synthetic.

2003 Suburban $1 kendall AZ score last year
2001 Suburban $1 Castrol
- - - - - - - - -- - - - - - - --
I Never thought i wold care about oil

#3444550 - 08/03/14 09:20 AM Re: There may be water in my Diff [Re: Realtech214]
buster Offline

Registered: 11/16/02
Posts: 29652
Loc: NJ
Just change it to be safe. I doubt it. When I got my Subaru stuck in water I had all the fluids changed out. Cheap insurance.

#3444557 - 08/03/14 09:25 AM Re: There may be water in my Diff [Re: Realtech214]
mcrn Offline

Registered: 11/30/05
Posts: 2794
Loc: FL
Looks like fun

#3444560 - 08/03/14 09:27 AM Re: There may be water in my Diff [Re: Realtech214]
Corvette Owner Offline

Registered: 01/22/03
Posts: 1676
Loc: Waldorf, Maryland
I would change it, they often have a vent.

Getting electronics wet is the death call for most modern vehicles. That is why insurance companies "total" flood cars.
98 Corvette
06 Murano
96 Chevy Van (Custom Conversion)
14 Chevy Impala
10 Starcraft Boat
13 Buick Enclave

#3444579 - 08/03/14 09:54 AM Re: There may be water in my Diff [Re: Realtech214]
Astro14 Offline

Registered: 10/10/10
Posts: 5815
Loc: Virginia Beach
If your seals are good, and your vent isn't stuck, you won't have water in your diff. Drove my 4 Runner through the storm surge of a Hurricane, flood waters in my street (we had evacuated to a nearby shelter) and even though the water was nearly 3 feet deep (up to door sills) as we drove several hundred yards through it, the diff fluid, front and rear, came out clean on the next change.
32 Packard 15W40
90 4Runner 5W30 Edge
92 300E 5W40 LiquiMoly
02 Volvo V70 T5 0W40 M1
02 Volvo V70 XC 5W30 PU
05 MB S600 0W40 M1
06 Corolla 5W30 Edge

#3444580 - 08/03/14 09:55 AM Re: There may be water in my Diff [Re: Realtech214]
svhanc Offline

Registered: 02/06/10
Posts: 165
Loc: Knoxville, Tennessee
Pull the fill plug.
If water got in, the level will be high and some will come out.
If none comes out, nothing went in.
2010 Toyota Tacoma 4x4 2.7 5spd (PP5w30&FramUltraXG8A@7500)
2011 Toyota Sienna Limited (PP5w20&Toyota Filter@7500)
2007 Suzuki SV650N
2000 Yamaha TW200

#3444612 - 08/03/14 10:27 AM Re: There may be water in my Diff [Re: Realtech214]
Chris142 Offline

Registered: 06/05/03
Posts: 12990
Loc: apple valley, ca
years ago an old guy told me 2 important things."dont make them fly and dont make them.float".

both of those things tear cars up fast
02 Wrangler durablend 10w40
87 F250 Diesel Mystic 15w50
04 Tahoe super-s 5w30
Z400 Lucas 10w30
KLR250 Maxima 10w40
Can am maveric delo 5w40

#3444634 - 08/03/14 11:06 AM Re: There may be water in my Diff [Re: Realtech214]
aquariuscsm Offline

Registered: 12/30/06
Posts: 12148
Loc: South Texas,USA
Man I bet that was a BLAST!!
1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Syntec 10W40/Fram Ultra
Amsoil MTG(tranny)
Amsoil 80W90 GL5(rear diff)
Mobil 1 ATF
Redline Water Wetter

#3444699 - 08/03/14 12:38 PM Re: There may be water in my Diff [Re: Realtech214]
joegreen Offline

Registered: 03/10/13
Posts: 304
Loc: NY
in the offroading community its common to change out your diff fluids after a good water fording. Anyway you have some miles built up on the fluid so i would change it anyway.
1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le

#3444749 - 08/03/14 01:47 PM Re: There may be water in my Diff [Re: Realtech214]
bdcardinal Offline

Registered: 06/03/05
Posts: 7799
Loc: Santa Barbara, CA
Some may have got into the diff. Check to see if there is a hose on your vent, there are aftermarket ones that are longer and have a filter on the end to keep water out.

It is nice seeing a truck all dirty. I hate seeing Raptors that are cleaner and more polished than my Mustang.
2014 Ford Mustang GT Track Pack
1995 Ford Mustang GT

Ford/Mazda Parts Counter
NRA Patron Member
Opinions expressed are my own.

#3444857 - 08/03/14 04:25 PM Re: There may be water in my Diff [Re: Realtech214]
andyd Offline

Registered: 09/25/04
Posts: 4394
Loc: Marshfield , MA
Water isn't good for ATs either/ I'd check all the stuff underneath
2 1988 BMW 528e 20w50 dino, STP filter

1994 Ranger ,600$ Rat, 5w30 dino, STP filter

#3445281 - 08/04/14 02:25 AM Re: There may be water in my Diff [Re: Realtech214]
wirelessF Offline

Registered: 10/04/07
Posts: 1532
Loc: Oahu, Hawaii
Luckily those GM 10-bolts (or all GM rearends) have a vent tube going up to the fuel filler neck so unless you went diving in water higher than your fuel filler then you should be fine.

Your Toyota friend may not be so lucky if he took his diff for a dive. Most Toyota's I've looked underneath have a one way check valve on the diff housing and can take in water. Alot of yota offroaders install diff vent tubes if they take their diffs swimming.

Edited by wirelessF (08/04/14 02:28 AM)

#3446098 - 08/04/14 08:21 PM Re: There may be water in my Diff [Re: Realtech214]
supton Offline

Registered: 11/09/08
Posts: 6587
Loc: NH
Could you pull the drain plug momentarily? Water would be on the bottom, no? I like the idea of checking the fill plug tho, to see if the level has gone up.
2011 Toyota Camry, base, 6spd manual, 95k, hers
2010 Toyota Tundra double cab, 4.6L, auto, 98k, his

#3446136 - 08/04/14 08:52 PM Re: There may be water in my Diff [Re: Realtech214]
01rangerxl Offline

Registered: 04/08/06
Posts: 8388
Loc: Birmingham, AL
Your truck is 2WD right? Unlikely a 2WD will get water in the diff without getting it very stuck.

Pull the fill plug and see what the fluid looks like. If there is no milkshake, it's fine.
2002 Ford Ranger XLT | 3.0 V6 / 5-Speed Automatic / 2WD | 176K miles
1994 Ford Ranger STX | 4.0 V6 / 5-Speed Manual / 4X4 | 173K miles