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Fluid Capacity And Service Light Questons

BagoXCAlum99

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BagoXCAlum99 Enthusiast

BagoXCAlum99

Posted
Posted

Hey all,

Just a couple of quick questions. I'm getting ready to change the axle and trasfer case fluids on my truck, and was curious what the capacites were. Its a 2005 GMC Sierra 1500 Z71. Just need to know how much fluid I need in each axle and the transfer case. Any recomendations as to brands? I also have a "Service 4WD" message that pops up on the dash. Is this related to the diff fluid needing to be changed?

 

Thanks for the help!

Matt

Z45 Senior Enthusiast

Z45

Posted
Posted

2 qts to cover the front and 3 to cover the rear. You will have about 1/2 qt left over. OEM used 75W-90 synthetic, AMSOIL is the best but there are literally 100's of brands out there to pick from, some good and many not so good.

 

TC takes special GM fluid, exact amount of I am not sure, 1 qt I seem to recall.

 

Service 4WD is not related to the axle or the axle fluid. Its transfer case related, something is wrong with either the dash switch or the TC modules which are electronic and riddled with problems in old body style trucks. I suppose its possible its related to TC fluid but highly unlikely.

 

New Body Style has been relatively trouble free with the 4wd systems.

BagoXCAlum99 Enthusiast

BagoXCAlum99

Posted
  • Author
Posted

Ok, thanks! Also, to change the rear fluid, do I need to take off the rear diff cover? I couldn't find a drain plug on the rear axle anywhere. Found the fill plug, but thats it. If I do need to remove the rear diff cover, anyone have the part number for a new gasket?

 

Thanks

 

Matt

Z45 Senior Enthusiast

Z45

Posted
Posted

Yes, have to remove rear cover. Will need a GM gasket, if you decide to use a liquid form in place gasket, make sure its for gear lube and you follow instructions on how to use it.

 

This is on a NBS but the axle is very similar How to Change Rear Differential Fluid

Bob D Enthusiast

Bob D

Posted
Posted

 

 

..anyone have the part number for a new gasket?
Just make a quick measured sketch of diff cover w/ no. of bolt holes. Any auto parts store should have it.

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