I've never had a quad 'bike' before, just a UTV 3-seater for the last 17 years. I'm looking for a 2wd electric quad just now and asked a dealer if his models had a diff lock, which would be important with 2wd. He said all quads have no diffs on the rear axle - it's a solid connection between the back wheels. I'm astonished - that's like having a diff-lock on all the time, which must make steering really difficult and carve up the ground no end. Please tell me he's wrong.