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SECOND/THIRD GEAR ONLY OR FIRST/FOURTH GEARS ONLY Second/Third Gears Only or First/Fourth Gears Only NO FIRST OR SECOND GEAR/NO THIRD OR FOURTH GEAR No 1st or 2nd/No 3rd or 4th NO SECOND GEAR, NO FOURTH GEAR AND NO REVERSE GEAR No Second Gear, No Fourth Gear and No Reverse Gear checkballs Input Housing Assembly 3-4 clutch or forward clutch plates worn Excessive clutch plate travel Cut or damaged 3-4 clutch or forward clutch piston seals Porosity in input clutch housing or piston 3-4 clutch piston checkball stuck, damaged or not sealing Restricted apply passages Forward clutch piston retainer and ball assembly not Sealing balls loose or missing Input housing (621) cracked or broken Case (103) 3rd accumulator retainer and ball assembly not seating 2-4 Servo Assembly (13-28) 2nd apply piston seals missing, cut or damaged Checks Causes 1-2 Shift Solenoid Valve Sediment is in the valves The electrical connection is faulty Damaged seal Checks Causes 2-3 Shift Solenoid Valve Sediment is in the valves The electrical connection is faulty Damaged seal Checks Causes Reaction Sun Shell (670) Broken spline on reaction sun shell/replace shell.
2007 Hummer H3 2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3
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