GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2001 🢒 Yukon XL - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L80-E 🢒 Harsh Shift D to R

Harsh Shifts -- Drive to Reverse

Checks

Cause

Direct Lube Exhaust

Blocked

Forward Clutch Spring (607)

Not acting

Retainer Ring (616)

Not seated

Checkball

Plugged