So I have a rebuilt trans that I got a yr ago and recently it’s been having shifting issues . If I go thru all the gears they’ll engage but when I’m driving , it won’t shift but if I really strap on the gas to about 5000rpms, it’ll hard shift then start shifting normally . Already check fluid and recently changed filter , no leaks either

 

Welcome to the forum. I'm moving your post to the Tahoe section where you will get more views.

 

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