your transfer case temperature should never go above 70C
Generally for a street car, diff and tranny temp aren't really essential. How many gauges are you planning to cram into your interior??
What everyone needs is a horizon gauge, like the planes have.
"Driving is like a narcotic, an addiction that can take over lives. It ruins people, breaks families apart, and even kills. Itís habit that needs to be fueled. Time, money, rationality, sweat, knuckle skin, and anyone who disapproves are of little importance to a driver, and are often overlooked. Hi, Iím Nelson, and Iím a drivaholic."