Automotive Forums

About a week or so ago the tranny felt like it was going...and then there was the burning smell.  It ran okay when cold but then once it heated up the van would lurch or give you whiplash when accelerating from a stop sign or light.  They rebuilt the tranny and it went in to the van yesterday but it wasn't driven until today.  And today it did the same thing it did before we had the thing rebuilt.  Cold it was fine---heated up we went back to lurching from a complete stop.  Anyone have any ideas?  They did replace a lot of the old parts and they showed them to hubby.  Thanks for any help.