Recent Topics
Break in...kind of
by stuka
05/24/17 12:35 PM
Fuel economy of oil not so simple?
by TheKracken
05/24/17 12:35 PM
1999 Infiniti I30, UOA ATF, 131k
by DzoG20
05/24/17 12:33 PM
Costs aside, do you like private school for kids ?
by Mr Nice
05/24/17 11:30 AM
2012 Subaru Impreza CVT hatch 100k mile review
by deanm11
05/24/17 11:15 AM
2002 Ford Crown Victoria 200k, 5.2 on Maxlife 5W20
by Colt45ws
05/24/17 11:05 AM
This is why I don't let anybody else change my oil
by Mossyoakglock
05/24/17 10:56 AM
Tuner for Chevrolet Tahoe?
by pacem
05/24/17 10:31 AM
Saw MotorKote @ Wally for $27.00
by Speak2Mountain
05/24/17 10:00 AM
Perfect SAT
by Virtus_Probi
05/24/17 09:41 AM
When's the last time you seen one of these on the
by 5AcresAndAFool
05/24/17 09:36 AM
My Wal-Mart has stopped carrying Maxlife atf
by NavyVet88
05/24/17 09:23 AM
Lexus Toyota V6's - Fitment for 2GR-FSE vs. 2GR-FE
by BeerLube
05/24/17 09:16 AM
Denso 90915-YZZF1 Oil filter cut open 5k interval.
by 5AcresAndAFool
05/24/17 08:18 AM
Beware of your surroundings
by CourierDriver
05/24/17 08:03 AM
Online viscosity calculators
by paulri
05/24/17 07:59 AM
Recalls: Audi, Chevy, Honda, Jeep, VW, MB, Toyota
by wemay
05/24/17 07:37 AM
Can't Email or Mail Banks?
by Ducked
05/24/17 06:15 AM
STP basic blue
by Camprunner
05/24/17 06:07 AM
2017 Silverado 5.3 filter ?
by dabo72
05/24/17 06:03 AM
Newest Members
Regina, stuka, rodekyll, nocarb, sebin
61653 Registered Users
Who's Online
96 registered (andyd, 1JZ_E46, CharlieJ, Astro14, 28oz, bunnspecial, 11 invisible), 2545 Guests and 10 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
61653 Members
66 Forums
265555 Topics
4388263 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Topic Options
#2111537 - 12/20/10 10:04 AM Rear Differential Oil Foamy/aerated
madibob Offline


Registered: 04/24/09
Posts: 119
Loc: Minnesota
Yesterday I checked the rear differential fluid in my Tacoma. When I pulled the plug, the oil seemed pretty foamy/frothy/aerated. I had just drive the truck about 5 miles on the highway prior to pulling the plug, so it wasn't sitting very long. I checked it this morning without having driven in and it was normal without all the bubbles in it. Does this seem like a problem? Doesn't seem right to me and has me a little worried. I would think there should be no air bubbles in it.
_________________________
2002 Toyota Tacoma 3.4L 4X4
2000 Ford F350 7.3L

Top
#2111542 - 12/20/10 10:11 AM Re: Rear Differential Oil Foamy/aerated [Re: madibob]
Steve S Offline


Registered: 01/20/03
Posts: 18449
Loc: East of IGO
There is going to be bubbles. The oil is whipped up by the gears turning in the oil.
_________________________
Why do people post I want the best for my car,,, When there isn't anything that is the best on the car to begin with.

Top
#2111554 - 12/20/10 10:16 AM Re: Rear Differential Oil Foamy/aerated [Re: madibob]
tinmanSC Offline


Registered: 09/07/10
Posts: 2231
Loc: Oswego, IL
It's normal. Gear oil can be whipped up by the gears pretty fast. There are some videos on youtube of people who have put on clear differential cases. You can see it directly. The oil starts out fine, and within a minute it looks like a frothy milkshake. This is normal. There are anti-foam additives in GL-4/5 to keep it from getting out of control.
_________________________
Cost of Hobby=2L
(Where L=Cost of Lubricant)
95 Lexus SC300 [email protected], 2000 [email protected] both VML Full Syn+Purolator PSL20195(soon to be Wix)

Top
#2111564 - 12/20/10 10:21 AM Re: Rear Differential Oil Foamy/aerated [Re: Steve S]
d00df00d Offline


Registered: 10/20/05
Posts: 10585
Loc: PA
Originally Posted By: Steve S
There is going to be bubbles. The oil is whipped up by the gears turning in the oil.

Exactly.

Some oils trap more or less air than others, but some aeration is completely normal.
_________________________
2011 Mazda RX-8 R3
Castrol GTX 5w-20

Top
#2111633 - 12/20/10 11:22 AM Re: Rear Differential Oil Foamy/aerated [Re: madibob]
madibob Offline


Registered: 04/24/09
Posts: 119
Loc: Minnesota
Thanks for the responses. Looks like I'm OK.
_________________________
2002 Toyota Tacoma 3.4L 4X4
2000 Ford F350 7.3L

Top
#2111732 - 12/20/10 12:25 PM Re: Rear Differential Oil Foamy/aerated [Re: madibob]
EricF Offline


Registered: 07/14/09
Posts: 1640
Loc: SF Bay Area
Is it the same reason the lucas oil stabilizer gets frothy?
_________________________
1993 Ford Ranger XLT 4.0L 4x4 (240k) 5W-30 Synpower
2006 Saturn Relay-3 3.5L (85k) 5W-30 Synpower
2012 Ford Fusion SE 2.5L (39k) 5W20 M/C Semi Syn

Top