Hi, I have a 1993 GMC 3500, crew cab, dually, 4x4. It has the 454 with 58k miles. I was coming home from the races today, and I lost first and overdrive. I was wondering if there is something simple I should be looking for to fix this, or if I'm in for a lot of work ahead of me? Thanks, any info is appreciated.

 

I did a search and found two other threads relating to this one, and the results are the same. I guess nobody knows.