Tibbs Starters & Alternators Ltd

I purchased a starting motor in December. The bendix drive began to malfunction. I brought the starting motor to his shop and he tells me that the ground wire is corroded. My van will now only start once out of every 10 times, now we will see what he has to say when I go to his shop this morning? Very disappointed, starting motor was only four months old and he was not replace it.