1991 Z28, L98, rebuilt trans, B&M mega shifter. Been sitting for two years, when i go to reverse it moves ~2' and then the rear wheels lock up. I put into drive move forward and again place in reverse and it locks up. I want to say its like it jumps out of reverse. The cables all look good expect a little rust. When i got the car their were no wires (backup lights,etc only installed revers lights) going to the B&M so i did install reverse light which don't work (that's for another day) trans fluid is fine any help or idea would be great

 

anyone, ideas,

 

thanks everyone