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Differential Fluid Change Or Addition?

neto1978

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neto1978 Enthusiast

neto1978

Posted
Posted

Silverado 2008 - 60k miles.

Light use, few 4x4 time operation.

no leaks at differential housings.

 

When is time to change or add fluid?

 

tks.

vettelovralexand Enthusiast

vettelovralexand

Posted
Posted

I would check the level if you never have (Spec says between .4 and .75 inches below the fill plug). Earliest I would worry about a change until 100k if you don't tow, but I would be thinking about it by now (50k) if you tow heavy on a regular basis.

jro909 Senior Enthusiast

jro909

Posted
Posted

100k...its synthetic so it will last alot longer then the pig fat of yesteryears...hell i know people that tow daily and have never checked it lol

neto1978 Enthusiast

neto1978

Posted
  • Author
Posted

If I wanted to take a look at the manual, I would.

Don´t loose your time answering to questions you may think we can find at manuals! :wtf:

Check the owners manual for maintenance schedule.

:rolleyes:

mc7719 Enthusiast

mc7719

Posted
Posted

Actually the differentials maintenance interval isn't IN the manual. At least not in mine. It just says the type of fluid, not how often to change it.

 

When you say 100k, us that mi. or kms? And also it lists only the rear diff is synth., so does that mean it can go longer between changes? Why would both front and back use the same? Can they?

jro909 Senior Enthusiast

jro909

Posted
Posted
Actually the differentials maintenance interval isn't IN the manual. At least not in mine. It just says the type of fluid, not how often to change it.

 

When you say 100k, us that mi. or kms? And also it lists only the rear diff is synth., so does that mean it can go longer between changes? Why would both front and back use the same? Can they?

 

 

i'm positive synethic is in the rear...i'm not for sure if synthetic comes from the factory in the front...you can run synthetic in both ends though...100k= 100,000 miles and yes synthetic can go longer back in the day the front diff wasen't synthetic because it wasen't constantly in use but they may have changed it now

vettelovralexand Enthusiast

vettelovralexand

Posted
Posted

I personally changed out the differential fluids and transfer case factory filled fluids after about 7k of break in. With the duty cycle my truck sees though, I should not have to change them for another 100k.

tanked_darren Senior Enthusiast

tanked_darren

Posted
Posted

Its easy to do, just do it when you do the transmission.

 

mc7719 is right it is not in the owners manual.

 

 

You should never have to add oil unless there is a problem.

8.1HD/ALLISON Senior Enthusiast

8.1HD/ALLISON

Posted
Posted

I would change mine no less then every 50k. Sooner if it is dirty. Gm and their "maintance free approach" is a total line of BS in my opinion. JMO

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