How good is yer transmission fluid? What's the current color/smell of it? Do you know what yer trans fluid temps are like? Have you thought about putting an auxiliary cooler on there?

How good are yer U-joints?

How clean is yer throttle body? How clean is yer IAC valve? How good are yer vacuum lines? How good is that air filter?

Any changes to yer truck? Added weight or bigger tire size?

1998 T-100 Xtra cab SR5 2WD Auto; Roadmaster Active Suspension; Yokohama Geolander HT-S; lowered air dam; full belly pan; 4? diffuser; 11" side skirts; dual transmission coolers; 67% grill blocked; Auto-RX'd; ScanGauge II/Ultra-Gauge