I have a 2000 Chevy Blazer with a 4.3 liter automatic trans 4x4 shifts on the fly.
When I am going down the road around 55 mph the rpms will jump up and down does anyone have any ideas what could cause this?
are you going uphill/downhill? cruise set? wet outside?
level ground, No cruise set. An it does it rain or shine.
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