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Replaced Differential fluid today #4443261
06/27/17 10:24 PM
06/27/17 10:24 PM
Joined: Dec 2013
Posts: 2,088
socal
barkingspider Offline OP
barkingspider  Offline OP
Joined: Dec 2013
Posts: 2,088
socal
Based on the dealer records / receipts from the previous owner, it doesn't appear the diff fluid was ever replaced so I decided to do it today.


Removed the full plug first


Removed the drain plug, oil didn't look bad but there was stuff on the magnet




I filled w supertech 80w90, will run for about 3k miles as a rinse then go with a full syn 75w90.


Took it for a drive and it runs normal and no whining.


06 Cadillac Escalade Ext
17 Cadillac ATS (wife)
05 Toyota Camry (daughter)
11 GMC Canyon off-road (daily)
Re: Replaced Differential fluid today [Re: barkingspider] #4443266
06/27/17 10:29 PM
06/27/17 10:29 PM
Joined: Aug 2010
Posts: 12,903
Northern Kentucky
901Memphis Offline
901Memphis  Offline
Joined: Aug 2010
Posts: 12,903
Northern Kentucky
Good idea on the extra flush


2012 Chevy Cruze LT 1.4T - 50k
2002 Buick Century 130k - Built 4T65e(Maxlife) - Edge 0w40 + Fram XG3980
Re: Replaced Differential fluid today [Re: 901Memphis] #4443295
06/27/17 11:00 PM
06/27/17 11:00 PM
Joined: Sep 2004
Posts: 7,533
Marshfield , MA
andyd Offline
andyd  Offline
Joined: Sep 2004
Posts: 7,533
Marshfield , MA
Why flush? Unless there was a problem.. A few bits of steel dust isn't a disaster.


'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: Replaced Differential fluid today [Re: andyd] #4443317
06/27/17 11:29 PM
06/27/17 11:29 PM
Joined: Jun 2011
Posts: 23
SO.CA,USA
hank55 Offline
hank55  Offline
Joined: Jun 2011
Posts: 23
SO.CA,USA
Good Pictures!
Henry

Re: Replaced Differential fluid today [Re: barkingspider] #4443518
06/28/17 08:04 AM
06/28/17 08:04 AM
Joined: Nov 2016
Posts: 183
PA
MarcS Offline
MarcS  Offline
Joined: Nov 2016
Posts: 183
PA
really no need to flush a differential. It's not like there are any small passages to clean

Re: Replaced Differential fluid today [Re: barkingspider] #4443564
06/28/17 09:07 AM
06/28/17 09:07 AM
Joined: Sep 2015
Posts: 2,263
Malaysia
zeng Offline
zeng  Offline
Joined: Sep 2015
Posts: 2,263
Malaysia
What's the used oil viscosity grade and its mileage ? ...... looks serviceable btw.

Re: Replaced Differential fluid today [Re: barkingspider] #4443737
06/28/17 11:26 AM
06/28/17 11:26 AM
Joined: Feb 2014
Posts: 2,491
Canada
Lolvoguy Offline
Lolvoguy  Offline
Joined: Feb 2014
Posts: 2,491
Canada
Looks good thumbsup

How do you know if you've over/under filled it?


06 Lexus IS350- Wife
88 BMW 325is- Mistress
Re: Replaced Differential fluid today [Re: Lolvoguy] #4443742
06/28/17 11:30 AM
06/28/17 11:30 AM
Joined: Nov 2016
Posts: 183
PA
MarcS Offline
MarcS  Offline
Joined: Nov 2016
Posts: 183
PA
Originally Posted By: Lolvoguy
Looks good thumbsup

How do you know if you've over/under filled it?


differentials have a drain hole and a fill hole. with the vehicle on a level surface, you fill until fluid starts leaking out the fill hole and then cap it when the stream slows down to a drip

Re: Replaced Differential fluid today [Re: zeng] #4443768
06/28/17 11:47 AM
06/28/17 11:47 AM
Joined: Dec 2013
Posts: 2,088
socal
barkingspider Offline OP
barkingspider  Offline OP
Joined: Dec 2013
Posts: 2,088
socal
Originally Posted By: zeng
What's the used oil viscosity grade and its mileage ? ...... looks serviceable btw.


Used fluid was FF 75w90 (assume GM ac delco) w over 116k miles on it, did not do a uoa on it. It didn't look bad at all.


06 Cadillac Escalade Ext
17 Cadillac ATS (wife)
05 Toyota Camry (daughter)
11 GMC Canyon off-road (daily)
Re: Replaced Differential fluid today [Re: MarcS] #4443780
06/28/17 11:57 AM
06/28/17 11:57 AM
Joined: Apr 2017
Posts: 1,480
Ontario, Canada
mightymousetech Offline
mightymousetech  Offline
Joined: Apr 2017
Posts: 1,480
Ontario, Canada
Originally Posted By: MarcS
Originally Posted By: Lolvoguy
Looks good thumbsup

How do you know if you've over/under filled it?


differentials have a drain hole and a fill hole. with the vehicle on a level surface, you fill until fluid starts leaking out the fill hole and then cap it when the stream slows down to a drip


I wish mine had a drain plug. Stupid BMW.


Mighty Mouse Tech
BMW Tech, Former Acura Tech
2010 Civic Si Castrol 0W40, Redline MTL
2013 BMW 135i M Sport Edition Castrol 0W40, Redline MTL
Re: Replaced Differential fluid today [Re: mightymousetech] #4443782
06/28/17 12:00 PM
06/28/17 12:00 PM
Joined: Nov 2016
Posts: 183
PA
MarcS Offline
MarcS  Offline
Joined: Nov 2016
Posts: 183
PA
Originally Posted By: mightymousetech
Originally Posted By: MarcS
Originally Posted By: Lolvoguy
Looks good thumbsup

How do you know if you've over/under filled it?


differentials have a drain hole and a fill hole. with the vehicle on a level surface, you fill until fluid starts leaking out the fill hole and then cap it when the stream slows down to a drip


I wish mine had a drain plug. Stupid BMW.


what a pain. do they want you to pump it out with a special dealer-only tool? that would be typical for the germans

Re: Replaced Differential fluid today [Re: barkingspider] #4443856
06/28/17 12:53 PM
06/28/17 12:53 PM
Joined: Feb 2013
Posts: 3,226
Central Virginia
Silverado12 Offline
Silverado12  Offline
Joined: Feb 2013
Posts: 3,226
Central Virginia
I thought about getting the Ford Racing aluminum pan (with drain plug and fill plug instead of a pan w/o anything) for my 2000 Mustang, but decided against it because I used synthetic 75W-140 and that should last another 100K miles. I had to pump mine in too. FWIW my fluid looked about like yours with a little more shavings on the plug. I wiped a lot of crud off the pan and paper toweled the inside of the diff best I could, so the flush isn't a bad idea since you can't get to the innards of yours.

Last edited by Silverado12; 06/28/17 12:58 PM.

12 Chevy Silverado ext. cab LS, 2WD 4.3 auto
18 Mustang GT 5.0 auto
07 Harley Dyna Street Bob 96 c.i. 6 sp.
00 Mustang GT auto
Re: Replaced Differential fluid today [Re: MarcS] #4443906
06/28/17 01:28 PM
06/28/17 01:28 PM
Joined: Apr 2017
Posts: 1,480
Ontario, Canada
mightymousetech Offline
mightymousetech  Offline
Joined: Apr 2017
Posts: 1,480
Ontario, Canada
Originally Posted By: MarcS


what a pain. do they want you to pump it out with a special dealer-only tool? that would be typical for the germans


BMW considers the fluid "lifetime", so they never change it. Had to suck it out using my brake bleeder.


Mighty Mouse Tech
BMW Tech, Former Acura Tech
2010 Civic Si Castrol 0W40, Redline MTL
2013 BMW 135i M Sport Edition Castrol 0W40, Redline MTL
Re: Replaced Differential fluid today [Re: mightymousetech] #4443925
06/28/17 01:48 PM
06/28/17 01:48 PM
Joined: Nov 2016
Posts: 183
PA
MarcS Offline
MarcS  Offline
Joined: Nov 2016
Posts: 183
PA
Originally Posted By: mightymousetech
Originally Posted By: MarcS


what a pain. do they want you to pump it out with a special dealer-only tool? that would be typical for the germans


BMW considers the fluid "lifetime", so they never change it. Had to suck it out using my brake bleeder.


As i just commented upon seeing the condition of my "lifetime" transmission fluid at 65k, me and the automakers are operating on a different definition of "lifetime." Theirs is clearly "just past the point where we don't need to pay for warranty claims"

Re: Replaced Differential fluid today [Re: barkingspider] #4443934
06/28/17 01:53 PM
06/28/17 01:53 PM
Joined: Aug 2004
Posts: 4,646
Katy, Republic of Texas
blupupher Offline
blupupher  Offline
Joined: Aug 2004
Posts: 4,646
Katy, Republic of Texas
Fluid coming out did not look too bad.


2012 Scion xB: QSUD 0w-20/CQ Blue/5k OCI
2002 Ford F150: GTX HM 5w-20/EcoGard Syn/1yr OCI
1994 Honda VT1100: Peak 15w-40/PSL/2500 mile OCI


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