Afterburner (campaign)?

[Mr Butlertron 10]

I completed the mission and got an update saying all vehicles will now be built with afterburners. So what am I meant to do with the 8 vehicles already in my carrier that don't have afterburners? Kamikaze them? And like a good little strategist I built up a stockpile of vehicles to deliver to my carrier at a moment's notice. Except they don't have afterburners either. Is there no sell/retire button?

[irgling 1]

Don't worry, they're retroed into existing vehicles.

[Mr Butlertron 10]

I'm pressing shift and nothing is happening.

[dram 14]

I'm pressing shift and nothing is happening.

Please check that:

1) You have turbo/afterburner assigned to a key, and that:

2) Pressing it reduces the aamount of afterburner/turbo to the right of the HUD (AFB/TRB)