slips a little at take off,but does ok at about 30-40 + on 1994 Mercury Sable

had tran rebuilt 1 1/2 yrs ago,reverse works fine it seems to be just 1st gear,do i need a readjustment maybe,or could a flush help me. when i turn corners,it gets slightly jerky,like its tring to catch up with the speed i was going,but if i dont take my cor too fast does much better.???

Asked by for the 1994 Mercury Sable
Sounds like a transmission problem, changing the fluid, removing the transmission oil pan to change the filter and inspect for debris is always a good try first to see if it helps. Of course check that the fluid level is correct.