hello i just got my pro street 82 z28 on the road built 60 over 350 400++ hp the tranny was a used 700r4 apparently out of a corvette the problem is it wont stay in low gear the shifter and linkage are all correct if i start in low it shifts into second instantly ive tried adjusting tv cable to no avail the original cable was lost and replacement cable seemed longer if the cable was to long would this account for my problem the fluid is red and doesnt smell burnt at all it shifts fine automaticallt otherwise but starting in low shifts into second right away and if i shift into 3rd it winds out before it shifts any help greatly appreciated thanks Sam