Mark9

Always good to use brass as it's softer. But not sure how softer than the aluminum case. The risk reward isn't there for me. If installing the drain fill adapter then I'd be good with it as it's normally a one time install. Mess up the drain plug, replace the pan. Mess up the fill plug hole especially when having 2 extra liters, big problem.

Strake

My choice for the brass fitting with the hose barb was not a long term application. I hand screwed it in, with NO tools and not 100% of the way in just long enough to fill the DCT with fluid. Then it was removed.... by hand. I could have just held the clear plastic hose in there with NO fitting, but risk that it would fall out, or my shoulder give out holding it. It's only intended as a temporary means of holding the fill hose in place. Had I found a plastic one of the proper size that would what I ordered, but found this for a reasonable price, and bought it.

Strake

YES.... M20 X 1.5 is the correct thread for the DCT FILL PLUG hole.

22c8z51

I look forward to a time when the DCT can be rebuilt instead of replacing the whole box for $20,000.

ZF 8HP90 (strong enough for dodge demon, and an absolute UNIT - fantastic transmission) full overhaul kit is $1,055

4thC4at60

Taking another road trip later today (4/4)... when I get back I'll have around 22K on mine. If something SHOULD happen to my car then I'll deal with it.

Heaven forbid, I might be forced to go back to DDing the Ferrari. There are C8s out there with thousands upon thousands of trouble free miles. I mentioned to someone the other day that one of the service advisors at a dealership I had just bought a "park at the airport" car told me he has a customer than has 68K miles on his. And the guy I told this to said he has a friend that has 85K on his. As I said, if something happens I'll deal with it then..... but, either way, I'm not going to

Mitchell_B

For reference, I changed the DCT external filter for the second time (550 miles was the first filter change) and drained & refilled the unit at 2365 miles. Attached is the oil analysis of the fluid at that 2365 mile change.

V Vette

Glad your having no issues, especially since you also have a prancing horse! Unfortunately, I don't and need to do whatever it takes to keep my car healthy. AND there are too may DCT issues out there so we need to beware! v

EvanD

I replaced my fluid a couple weeks ago. I bought the recommended nipple but it was the wrong size so I just put the tube through the hole and filled from the wheel well with the wheel removed. Did it at the 15deg angle to put the extra in (2020). I could use a flashlight and see the level through the fill hole. I took out 7 1/2 (by memory) and 8.2 got me to level full and 9.8 to at an angle full. I had bought 10qt so that was really good. Got it from Rock auto.

Andybump

What size was the wrong size? M20x1.5?

V Vette

Cool... any tips on how you supported car on angle, did you go all the way under to get to plug, fill method, ? What size diameter tubing, etc.. Thanks!

EvanD

Yes but the package had been opened when I bought it. I just did a visual with the plug and shrugged and then just put the clear tube in the fill hole itself. worked like a charm.

EvanD

I jacked up the rear with two jacks and put two stands under, pulled the drivers side rear wheel, pulled the shear plate, drained. Lowered to level and put in the side plug to full (to see what it would take and the determine if I wanted to add the extra 2qt.). I then decided to add and jacked the car up evenly sideways 12" (trig says that's about 15deg) and added to full through the wheel well.

Other than the shear plate and some previous owner/ service person had rounded the eTorx bolts it was quite easy.

1/2" id 10' from Lowes but used about 4', 3' even would have been okay.

Andybump

I guess what I am trying to get to though, is do you think that M20x1.5 is the wrong thread. That is, if the package was opened, perhaps the wrong item was in the package. Do you know what the correct thread is for the fill plug? Two folks above indicate it was correct, and one claims to have used it. Here also is a link to a post that claims its M20x1.5 as well.
https://www.corvetteforum.com/forums...read-size.html

EvanD

Simply I don’t know…

JerryU

If not track fill then just do what the Great C8 trained tech on my 3 year all DCT Fluid replaced. NO need to tilt anything. That is not a safe practice even though some do it!

You'll find when the last drop is drained it will take 10 Liters (some is left in filter hosing etc.

Did it all from under the car. Need to remove the aluminum pad to: 1) remove the drain plug remove the DCT fluid 2) to access the fill plug. He is putting that hose into the check level/fill hole. Just need to hunt for that fitting.

Andybump

Jerry, are you saying you can get to both the drain plug and the fill plug on the transmission without removing a belly panel? I did not know that. The manual call for removal of a panel to access those.

JerryU

^^^
NOPE! I said: Need to remove the aluminum aero pan to: 1) remove the drain plug remove the DCT fluid 2) to access the fill plug.

Fixed typo pad to pan and added aero!

EvanD

Lets say shear plate as that's what it's called. Yes, no reason to tilt if not adding more than the regular fill. I don't see what is unsafe about jacking up the side of the car. Your trained mechanic has a stupid way to refill the DCT in my opinion.

Andy, the fill plug can be gotten too (both to remove and to install and retorque in the wheel well. I see no way to get to the drain, especially to get a torque wrench on it afterwards, without dropping the shear plate, which in the end wasn't that hard to do.

JerryU

My trained mechanic does everything by the book! No smart dealer would let his tech tilt the car and fill that way. That is stupid and unsafe. Chuck the tech in the dealership where Conti makes video's said exactly that.

In fact , when that was posted, in the same thread I estimated it would take 15 degrees. That was June 2020- here is the post or you can search! Since I have seen the way folks jack the car to do that and it's totally unsafe. I now put a STOP sign on that post!

Do as you wish BUT calling this great Tech stupid makes you totally ignorant in my book! It's the way others in the shop fill transmissions!

V Vette

Thanks Evan!