Re: NV4500 transmission Cooler
Actually, the NV4500 generates a LOT of heat. That is the primary reason it uses synthetic lube. Dino lube would break down in record time in the 4500. I run Redline synthetic in mine (behind the Cummins in my M-715) instead of the Castrol Syntorq. I mix 50/50 with redline's MTL and MT-90 GL-4 synthetics. You don't want to use a GL-5 synthetic in the tranny. Those coolers and the extra quart of lube are said (by owners on the turbo diesel register newsgroup) to keep the temp down especially if running one on both sides of the tranny.
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