GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Geo 🢒 1996 🢒 Tracker - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 3L30 🢒 Upshift in D and D2 at WOT Only

Upshift In "D" And "D2" At WOT Only

Checks

Cause

Vacuum Modulator

Failure

Modulator Vacuum Line

Leaky or interrupted

Engine Or Accessory Vacuum System

Leak

Detent Valve Or Cable

Stuck