No matter what type of puller you have, a nice set of gauges is worth the extra change. While we understand that you might not want a barrage of units staring at you going down the road, we suggest having at least a transmission temperature gauge. Keeping track of your transmission's temp by way of a little gauge is cheap insurance. Excessively high temperatures will kill a transmission faster that anything. For those of you equipped with a diesel, an EGT (exhaust gas temperature) is also a great investment that will let you know when things are getting a little too hot.