C6 diff fluid change step by step w/pics
I thought a few of you may try this yourself since it is the easiest change I have done so far. Chevy qouted me $299 to change the fluid FYI.
We could make this a tech sticky and I will be doing the A6 trans fluid next weekend the same way.
I bought Royal Purple 75x90 (2 qts) from Pep Boys. $9.99 each.
1- cheap pump Pep Boys $7.99
1- 10 mm Allen head socket
Im using Royal Purple since I have had great history with it and it does contain the friction modifier already.
Jack the car up making it as safe and level as possible. My driveway slopes up so it looks way off but it isnt.

Locate the fill plug between the 2 mufflers over to the right a little. Make sure you can get it loose or this is all in vain, that sucker is on t i g h t!

Now locate the drain plug just under the diff.

I had to use a breaker bar with a small extension to reach both plugs since it is very tight under there.

Drain the fluid in an oil change container since there is very little and then replace the drain plug. Now remove the fill plug if it is still in and take the cheap pump and put it in a 1 gallon water jug but make sure the jug is DRY inside. Fill with both quarts of Royal Purple and slide the hose into the diff and pump away. This pump worked much better than expected. I will be keeping it for sure.

Thats it, you are ready to go.

Very easy and did I mention I love this car? It really does need about 200 more horsepower though.


Royal Purple 75x90 contains the additive in there already. I was told $299 with fluids but I only called to see how much I was saving doing it myself, I had no intentions of actually letting the dealer touch my car. I pity guys who have paid that much and didnt realize how EASY this is, so thats why I did this post.
figure out what they'd charge and then do it myself
like this winter i may be doing my own clutch install
save my *** $2g's. Also from the looks of it it will be the same writeup to use for the C5 Vette's as wellTrending Topics
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