2001 4wd Blazer, rpms rev but no movement by suv.
I have to warm the engine in cold weather to get any movement. I accelerate and RPM's rev up to 5, no movement until 3 or 4 bursts then suv goes to 10 mph. Then another 4 bursts, rpms reach red level on dial and suv moves to 35mph. Won't go past 50 mph. Just happened today.