Slipping 1-2 Upshift. Chevrolet Joy 2008

For 1990-2009 cars

Checks | Causes
--- | ---
Line pressure solenoid | Refer to DTC 48 .
Transmission fluid level | Refer to Transmission Fluid Check .
Select linkage | Refer to Park/Neutral Position Switch Replacement .
Throttle angle | Throttle angle out of adjustment. Refer to Symptoms - Engine Controls .
Low clutch | Burn or wear of the low clutch. Refer to Low Clutch Disassemble .
2-4 brake | Burn or wear of the 2-4 brake band
Control valve spool | Control valve spool error