Master Mechanic Achievement not Unlocking!

I've managed to unlock everything except for the Master Mechanic Achievement (Create all 10 Combo Vehicles). Which I have done so many times that my total combo vehicles made is over 500. I have all the vehicles and blueprints and even the achievement
for creating 5, but for some reason I can't unlock this one.

Has anybody else had this problem, or know a way of sorting it out.

I've tried making all 10 combo vehicles in story mode on every chapter, overtime mode, nightmare mode, co-op, offline, after hard restarting, after latest Patch (DLC), during Broken Eagle DLC, in garages and outside garages and nothing has worked.

Any ideas?

:)

 

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This happened to me. After I 100% the game, I went through and created all of the combo vehicle again, checking off each one I did. I ended up getting the achievement. I believe it is a bit glitchy. Best advice is to redo the combo in the main chapter after
unlocking everything (unlocking all of the vehicle perks is a plus). Hope this helps.

 

Cheers for the reply. I have all the perks and skills unlocked also and I've even went through a list of the different vehicles for example making the mobile locker with 2 vans, 1 van and party van, 1 van and firework van, 1 van and ambulance etc and still
nothing, I've completely run out of ideas.

Do you know if creating one of them is supposed to put the % up for unlocking the achievement because mine is stuck on 0% and I'm not sure if that's supposed to go up for each combo vehicle made.

 

To be honest, I'm not sure how the % works. If it's stuck at 0%, that might be a problem.

If you're talking about the % for the achievement, I'm still not sure. On that vehicle achievement, I never noticed mine going up, it was staying at 0%, so I don't believe it keeps track through the achievements. Some achievements do keep track, but I found
a few glitches here and there.

 

It's weird, I should definitely have gotten the achievement by now, I even make all 10 combo vehicles in-between missions just to see if it will work but I did notice when I start a new game that a few of them flash up new like they did when you first find
the blueprints, is that supposed to happen?