I read on Wikipedia that Jeff Fenholt left from working with Tony Iommi (Black Sabbath) to join Driver with Rudy Sarzo, Tommy Aldridge and Craig Goldy (guitarist for Dio and Rough Cutt). This must of been a preliminary lineup. The ongoing and final lineup was Rudy Sarzo, Tommy Aldridge, Rob Rock, and Tony Macalpine which resulted in the MARS Project Driver album. I don't remember reading about Craig Goldy and Jeff Fenholt being apart of the original Driver around 1985, not to be confused with the second version of Driver in which Rob Rock formed with Roy Z in 1989 that released the 6 song blue demo album wich was released in 2008 as Sons of Thunder with additional songs.
Also, he did work for Joshua Periah on the Surrender album. There are talks of Joshua doing another album with Jeff. Interesting stuff.