After noticing the unmistakable smell of burnt transmission fluid, a quick check of the dipstick confirmed our suspicions that something was amiss inside our E4OD. Once we pulled the drain plug, it was obvious something metallic was breaking down inside. Following a quick call to John Wood Automotive, one of the premier E4OD/4R100 builders in the transmission world, we had an appointment scheduled to get our slushbox into his highly capable hands.