- Reduce trim incorporates a 7mm screw and T20 screw. Get rid of and pull down tough. Not necessary to clear away decrease trim for 2018's. You merely will need to interchange your switches. There’s a fantastic youtube tutorial by CJPonyParts on getting rid of the wheel and replacing switches. https://trevornhari.ageeksblog.com/31056400/what-does-mustang-gt-digital-dash-for-sale-mean