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Diff Fluid Change #4759718
05/17/18 10:36 AM
05/17/18 10:36 AM
Joined: Sep 2005
Posts: 5,750
MIchigan
Warstud Offline OP
Warstud  Offline OP
Joined: Sep 2005
Posts: 5,750
MIchigan
When filling the Differential do you fill it and immediately install fill plug or wait for the fluid to quit dripping out ?

Re: Diff Fluid Change [Re: Warstud] #4759725
05/17/18 10:43 AM
05/17/18 10:43 AM
Joined: Nov 2008
Posts: 12,674
NH
supton Offline
supton  Offline
Joined: Nov 2008
Posts: 12,674
NH
I don't think it matters. It doesn't require a precise level of fluid.


2011 Toyota Camry, base, 2.5L/6MT, 163k, hers
2010 Toyota Tundra DC, 4.6L/6AT, 144k, ours
1999 Toyota Camry LE, 2.2L/4AT, 190k, his
Re: Diff Fluid Change [Re: Warstud] #4759727
05/17/18 10:43 AM
05/17/18 10:43 AM
Joined: Apr 2013
Posts: 2,369
The Northeast
mclasser Offline
mclasser  Offline
Joined: Apr 2013
Posts: 2,369
The Northeast
I fill it until a slow stream drips out, tighten the plug, start the car and drive it forward and in reverse several times to settle the fluid. I then remove the plug again and do a final top off (it always ends up taking a few more pumps of fluid).


2018 Hyundai Elantra VE -- 5K
2013 Honda Pilot EX-L 4WD -- 56K
2002 Honda Accord EX-L -- 211K

Re: Diff Fluid Change [Re: Warstud] #4759728
05/17/18 10:44 AM
05/17/18 10:44 AM
Joined: Jun 2002
Posts: 12,555
The Motor City
Kestas Offline
Kestas  Offline
Joined: Jun 2002
Posts: 12,555
The Motor City
I would immediately install the fill plug. The extra few teaspoonfuls are added insurance should the fluid start weeping. I doubt you could overfill it.

Re: Diff Fluid Change [Re: Warstud] #4759741
05/17/18 11:02 AM
05/17/18 11:02 AM
Joined: Feb 2003
Posts: 6,003
Cajun Country, La.
BlueOvalFitter Offline
BlueOvalFitter  Offline
Joined: Feb 2003
Posts: 6,003
Cajun Country, La.
Originally Posted By: Warstud
When filling the Differential do you fill it and immediately install fill plug or wait for the fluid to quit dripping out ?

That's how I do it.
Some applications state that if you insert your pinky and can feel fluid on the end of it, that's enough as well.
BTW, I use a gasket instead of RTV. It's a guaranteed seal, and you can fill the differential immediately afterwards, instead of waiting for the RTV to dry.
thumbsup USA

Re: Diff Fluid Change [Re: Warstud] #4759747
05/17/18 11:06 AM
05/17/18 11:06 AM
Joined: Aug 2017
Posts: 147
Displaced Texan in Mexico City
Gimpy1 Offline
Gimpy1  Offline
Joined: Aug 2017
Posts: 147
Displaced Texan in Mexico City
An ounce is not going to make any difference, also remember that you are filling the fluid COLD, when you drive the vehicle the fluid will get hot and expand. A word to the wise when changing diff fluid or any fluid for that matter. Remove the fill plug first, then the drain plug. There is nothing worse than draining a diff only to find out you don't have the right socket or tool to remove the fill plug, ask me how I know!

Re: Diff Fluid Change [Re: Warstud] #4759794
05/17/18 11:49 AM
05/17/18 11:49 AM
Joined: Jul 2005
Posts: 30,578
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,578
NY
I make sure the vehicle is level or very close to it. As the gear oil starts do flow out I put the plug back in and call it good.


God Bless Our Troops

Re: Diff Fluid Change [Re: Warstud] #4759828
05/17/18 12:27 PM
05/17/18 12:27 PM
Joined: Sep 2007
Posts: 8,598
Florida
artificialist Offline
artificialist  Offline
Joined: Sep 2007
Posts: 8,598
Florida
I fill it until the fluids drips out of the fill hole. Many cars and trucks call for fluid to be about 10mm below the fill plug, but I never had a problem going all the way up.

Having the vehicle on a level surface is extremely important, I'm not sure what to do if you have to repair your truck on an uneven surface.


2010 Lancer Ralliart Sportback
Re: Diff Fluid Change [Re: Warstud] #4759855
05/17/18 12:53 PM
05/17/18 12:53 PM
Joined: Dec 2013
Posts: 2,093
socal
barkingspider Offline
barkingspider  Offline
Joined: Dec 2013
Posts: 2,093
socal
I pump the fluid until it starts to leak out but I install the plug immediately, not so much to keep more fluid in, but more to keep the fripping fluid from messing up the diff housing and my garage floor. Never had any issues with it being filled up to much

Last edited by barkingspider; 05/17/18 12:54 PM.

06 Cadillac Escalade Ext
17 Cadillac ATS (wife)
05 Toyota Camry (daughter)
11 GMC Canyon off-road (daily)
Re: Diff Fluid Change [Re: Warstud] #4760312
05/17/18 08:00 PM
05/17/18 08:00 PM
Joined: Feb 2015
Posts: 726
Sask, Canada
BrianF Offline
BrianF  Offline
Joined: Feb 2015
Posts: 726
Sask, Canada
With my manual pump it takes time to fill the diff. So the oil does not pour out. When it begins to dribble I cap it and like others have said, go drive it around a bit and check later to ensure the oil has been distributed in the diff. This method has yet to fail me.


2006 Trailblazer LT. Castrol Edge with Fram Ultra.
2017 Ram 3500 SLT Megacab. Duron SHP 10w30 with Hastings LF608.
1993 GMC 1500. It has oil and still runs
Re: Diff Fluid Change [Re: mclasser] #4760575
05/18/18 05:56 AM
05/18/18 05:56 AM
Joined: Jul 2010
Posts: 2,647
Dallas TX
MetalSlug Offline
MetalSlug  Offline
Joined: Jul 2010
Posts: 2,647
Dallas TX
Originally Posted By: mclasser
I fill it until a slow stream drips out, tighten the plug, start the car and drive it forward and in reverse several times to settle the fluid. I then remove the plug again and do a final top off (it always ends up taking a few more pumps of fluid).


I do different . I drive couple 8 figure . Park it and pop the fill plug . Check if fluid right on top. Next 2-3 day I do keep eyes on it. After that . Change every 60k or 5 years


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