The scania and volvo are quite a slow changing box ive never had problems with either but you cant rush them.
The scania does need time to warm up and a couple ive driven the splitter wouldnt work when very cold.
Exactly the same story here. The 3 over 3’s an 'orrible box and when I drove one it wasn’t high mileage. 2nd would always give a snick going up or down. The range changer was replaced and it still wouldn’t work when it was cold… Well not quite true. The one I had would be ok until I went to high range, then it wouldn’t come back down until it was good and hot.