Someone define 'glider'

I agree, I think they know that a lot of people will keep rebuilding what they have for as long as they can rather than buy a new truck, so emissions is less of a concern for the government than that tax money. They can have old tired trucks running until they fall apart, or you can let people build a newer safer truck. Emissions will be more of a concern when new engines get better economy and are as reliable as the old ones, we have some years before that happens. Diesel engine manufacturers are going through the same learning curves that the auto manufactures went through in the late 70's/80's. Most of us remember all the issues with cars, pulling off smog pumps, converters, blocking off EGR valves, etc. There's no reason for that any more, new cars are reliable now. This will be the case with trucks too, but we have while before we get there.

 

Origonally a glider kit was the truck less engine , trans and rear suspension, for rebuilding wrecked or in need of lots of repair, but had a good drive train. the current trend to rolling gliders started when the electronic engine came out , and more so for emmisions.