Okay I have a 700r4 just freshly installed over the weekend with fresh Corvette internals and a larger boost valve, I got the transmission in and did the procedure of starting and running while adding fluid till filled up, as well as putting fluid in the converter. I took my first test drive and I have no reverse, over drive or really an actual drive. If I put it in second it's really weird and will shift through 2-3 not sure about 4th and will speed up fine but is sluggish off start because we'll... 2nd on start I would say. I don't know what it is, my father did most of the assembly work because I don't know how to rebuild a tranny and I'm hoping to fix this issue very soon... Can y'all help me please? I don't believe the sprag is backwards either to make note of that but still possible. Any help is much appreciated.(it's in a c1500 STD cab long bed with a 305tbi)