No 2-3 Shift or 2-3 Shift Slips, Rough or Hunting

WARNING: This page is about a different car, the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

No 2-3 Shift or 2-3 Shift slipping, Rough or Hunting

Checks	Causes
Oil Pump (4)	Stator shaft bushings scored or off location
Valve Body Assembly (60)	2-3 Shift valve train stuck Gaskets or spacer plate incorrect, mispositioned or damaged 2-3 Accumulator valve stuck Face not flat Chips in servo feed oil, orifice #7 in spacer plate Mislocated valve body to spacer plate checkball or checkballs
Input Housing Assembly (620-621, 646-655)	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 seating 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