Cat 615 2

Hi all, really struggling with a 2000 model 615, the company I'm working for has 2 of them the same, the one I drive the most doesn't lock up in 4,5,6, like the other one, just had the converter done up (which made it better but still lacking) was told something about revs maybe not getting there, another about solenoids (somewhere) no-one really gives any solid evidence as to what it might be, just pisses me off when people drive around you like your a learning (which I sort of am) any...

Cat 615 2

Cat 615 2