Were the vehicles purchased while you were married? If so, it doesn't matter how they're titled -- they're marital property, and she doesn't just get to have them. It needs to be the subject of negotiation and agreement and, until that happens, they're half yours and half hers.

Don't fix her car.

Me: 46
W: 44
Married: 17
Together 21
D13; S10
BD: 03.03.15 (Not attracted to you)
Almost 2 years trying, alone, to save marriage
Status now: Divorced (effective 06.13.17)