Question Regarding Diff Fluid Change..

[dec322]

So if the rear already has synthetic in it there is no need benefit in changing to synthetic?! It already has it. I guess the benefit simply came from changing old fluid out for new.

Right?

 

[thumper_ehhhhh]

You know the little book that comes with the truck in the glove box? It has all the different fluids needed and amounts needed. If I get a chance next break I will go out and get mine and look it up. As for what I did. $150.00 I took it to my tranny shop the did a tranny fluid and filter, both front and rear axle fluid change, and the xfer case fluid. I had to get someone to do it because of my warrantee.

 

[thumper_ehhhhh]

ok these are the recomended fluids and lubricants for a 2004 tahoe / suburban

engine oil
engine oil which meets gm standard gm6094m and displays the american petroleum institute certified for gasoline engines starburst symbol. gm goodwrench oil meets all the requirements for your vehicle. to determine the proper viscosity for your vehicles engine see engine oil on page 5-17 it says 5w30

engine coolant
50/50 mixture of clean drinkable water and use only dex-cool collant

hydraulic brake system
delco supreme 11 brake fluid or equivalent dot-3 brake fliud

power steering system
gm power steering fluid (gm part no. u.s. 89021184 in canada 89021186).

automatic transmission
dextron III automatic transmission fluid

front axle (four wheel drive)
sae 80w90 axle lubricant

front axle (all-wheel drive)
sae 75w-90 synthetic axle lubricant

rear axle
sae 75w-90 synthetic axle lubricant

rear axle (steerable)
synthitic axle lubricant use gm part no u.s. 12378557 in canada use 88901362. do not add friction modifier

transfer case (all wheel drive with stabilitrak)
dextron automatic transmission fluid

automatic transfer case (four wheel drive)
auto trak II fluid gm part no. u.s. 12378508. in canada 10953626

front axle propshaft spline or one peice propshaft spline (two -wheel drive with auto trans)
spline lubricant special lubricant (gm no u.s. 12345879 in canada 10953511) or lubricant meeting requirements of gm 9985830 .

It doesnt say how must fluid goes in each other than oil coolant fuel and a/c refrigerant capacities.
I hope this helps you get what your looking for.

 

[Robert.K]

I run RP in everything and I think that stuff is mixed with angel blood!! It is crazy how good it is, from the oil and P/S, to the tranny and diff fluids. I'm putting in the radiator coolant next week for a full RP. Its expensive as hell, but worth every penny. The oil last a whole lot longer, Change it at the prescribed mileage and it wasnt even dirty.

 

[jmildoc]

yeah last time i change my oil i used 5W20 on accident so I need to get the right stuff in there. I was actually thinking of putting 10w30 in there since i have 150K

 

[Tribalbreak]

im doing the front and rear diff probly tommrow or thursday, and i just want to make sure that there is nothing i have to add to the diff fluid... 03 denali, AWD

 

[ez__rider]

So: I don't see any writeup here on doing the front diff... can anyone put some info up, from experience?

 

[Stein2088]

You know the little book that comes with the truck in the glove box? It has all the different fluids needed and amounts needed. If I get a chance next break I will go out and get mine and look it up. As for what I did. $150.00 I took it to my tranny shop the did a tranny fluid and filter, both front and rear axle fluid change, and the xfer case fluid. I had to get someone to do it because of my warrantee.

^^^^ LOL SO TRUE

As for someone saying that they have heard of guys adding fluid. I put RP in an 02 camaro once and I constantly had to add oil to the engine... To be honest I never looked at the tranny or rear end to see if it was low but never had an issue either. Anyway back to the engine it didnt burn it and it didnt leak it. I was told the RP oil molicules (my spelling SUCKS) are so small the the engine block can actually absorb some of the oil. Has anyone ever heard of this before???

Also my 03 according to the book that is found in the glove box not only came with synthetic all the way around but it requires it except for that GM blue stuff in the Transfer Case. I still feel adding a better quality Synthetic you would see a gain in addition to replacing old oil.

 

[Matt06Yukon]

Not real crazy about RP. Never heard good stuff about it, maybe ok for old school muscle but I'm sticking with my Mobil 1 or better. We can have a long disscusion about oils and how even Mobil 1 isn't really a true synthetic but ill save it. Front diff is a piece of cake, remove both plugs on the diff. Clean and reinstall lower plug, add fluid until it starts coming out the top plug hole then reinstall that plug. Done.

 

[06GMC5.3L]

Plan on doing front and rear diffs in my Sierra when my Amsoil comes in. Putting 75W90 in both.


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