What is stock? Did you ever change it from the original fill? If not, how many miles before failure? If you did change it, who did it?

 

Hey, you may be onto something...

How are the underbody setups for those who have failed?

I run the tray, AND my downpipe is wrapped in Thermotec heat wrap.

 

i don't know if the diaqueen is synthetic or not. it should be for the price, but it doesn't indicate that it's synthetic anywhere on the container. i was just searching for a known synthetic exact equivilent and came across the syntorq, it seems to be a popular choice for a lot of european race teams, so i decided to try it. it's a little cheaper than the diaqueen, but shifts a tad smoother, especially when cold. you can order it online or get it from your local dodge dealer repackaged as a mopar fluid for the NV4500 deisel tranny, same fluid though. i can get the part number if anyone's interested. it's weird looking too, the fluid is clear. worked out great for me though, hopefully it can take a little more heat before breaking down than the diaqueen.

 

It'd be wonderful to find a dealer online that sells the geniune stuff. Anyone have any ideas? I've been looking and can't find anything yet.

 

Amsoil has something like the syntorq, they even list it for the NV-4500 trannys... hmmm

https://www.amsoil.com/storefront/mtg.aspx

 

http://www.standardtransmission.com/dodge.html-scroll to bottom
http://quad4x4.com/NV4500%20Parts.htm-scroll 1/4 of the way down
but like i said, i assure you that it's the same stuff you can get at the dodge dealer, just repackaged in quart containers. it still states 75-85 GL-4 full synthetic gear oil for NV4500. it's the only oil that is supposed to be used in that tranny. as far as i know, it won't be labled castrol unless it's in a 55 gallon drum, so you have to buy it repackaged in the smaller containers unless you live in europe.

 

i wouldn't use that since it's a 75-90 and not an exact equivilent of the 75-85 you should be using.

 

It does say its an equivalent to 75-85 though when you read further. Not sure though, wouldnt want to chance it probably.

 

that's about 126°C and for the test, that seemed to still be in the "safe" range. It's still pretty damn hot, so make sure you give the car plenty of time to cool down naturally before shutting down. If you're doing hot laps, do one or two cool down laps and let it idle for 5-10 minutes with the hood open. If you're driving around the street and seeing those temps, well, you must be driving pretty hard and that opens up a whole can of safety and morality worms...

I've talked to several enthusiasts at track days and some of them say their oil temps reach over 280. Especially Z06 drivers, they were all like "oooh yeah it's really common, even with the factory oil cooler... They pull off when that happens but they say they never see problems. If getting oil temps to 260°F is common for you, I'd change the oil frequently just to be safe.

Again, oil temps are only what the seneor reads. Temps on the cylinder walls and bearing surfaces is significantly higher.

 

Yeah, it's at the track, primarily at the end of the session... I do a really good cool down lap, and let the car idle for a while. On a hot day, I drive it around a little more, and open the hood.

My oil temp sensor is right by the oil filter.

 

Ideal operating temperature for motor oil is around 170-190F. Dino grade motor oil begins to breakdown rapidly after 220F. Synthetics are supposed to begin breakdown after around 260-280F.

 

I hit 270F engine oil temps at the track so now you know how hard I run the car.

I am moving to redline motor oil for the next track event. I have been using Mobil1 with a qt of 20w50 syntec up till now. I want some more protection, which is why I am going to be moving to redline.

 

Not to change subject too much, but what about the Amsoil racing engine oil?

https://www.amsoil.com/storefront/tso.aspx

Seems to sound pretty good.

 

Amsoil is my favorite. I use it for the engine and tranny.

 

I have been using their 10w30 turbo formulation...seems to be working pretty good. I have noticed less oil consumption than both royal purple and mobil 1.