Seems the seals blown out in my NV4500 last week. No idea how it got this bad this quick. But that's not here nor there. It's hasn't even been wet I can't find the GL4 Castrol Syntorq fluid anywhere in town. Found some Royal Purple Max Gear 75w90 that's gl4. I'm throwing out about a quart per 400 miles. I have a rebuild appointment made to get the trans rebuilt. He said about $600. I was told by the Dodge dealership that the The Chrysler part number 12346191and the GM part number 4637579 are now cross referenced to ATF. Doesn't seem right. And neither dealership carriers the correct gear oil for it. And the lead mechanic said to drop dino oil in it and drive it without the synchros once they go bad. Just double clutch it. Being I don't know anything mechanical about transmissions and I can't get an appointment with my trans guy until the beginning of November, I don't know what to do. I can't NOT drive it since it's my only vehicle within 300 miles and I'm over here in a another state doing training with my job. So I can either 1. Run some Royal purple and try to keep it topped off. $24 a quart 2. Run some dino oil and keep it topped off but might damage my synchros $6 a quart but "drive it double clutching" 3. Some some pennzoil Synchromesh which seems to be GL4 but a bit thinner than the 75w90 but thicker than the ATF $9 a quart.