OK I HAVE A 87 CHEVY MONTE CARLO LS IT CAME WITH A FUEL INJECTION V6 SO I DECIDED TO DO A ENGINE SWAP I FOUND A 96 LT1 BUT NO 4L60E I INSTALLED THA MOTOR (ONCE I GOT A TRANS) USING THA FACTORY WIRE HARNESS FROM THA 96 (BY PASSING THA PASS KEY CODE WAS EASY) SO LONG STORY SHORT I GOT IT RUNNING BUT TO MY SURPRISE WHEN I MADE MY 1ST PASS DOWN THA STREET SHE TOOK OFF LIKE A BAT OUT OF HELL (WORTH EVERY PENNY AND SLEEPLESS NITE) BUT IT WOULDNT SHIFT OUT OF 1ST GEAR SO ME AND MY BROTHER TRYED A FEW DIFFERENT THING NOTHING WORKED SO I TOOK THAT TRAN OUT AND INTALLED ANOTHER (2ND) NOW THIS TRANS DID SHIFT BUT NOT NORMAL WITH W.O.T IT WOULDNT UNLESS I GOT OFF THA GAS AND GOT BACK ON IT BUT WITH A NORMAL TAKE OFF IT MIGHT SHIFT ON A GOOD DAY (BOTH TRANS WERE BAD) SO IM TRY TO FIGURE OUT WHAT TO DO ANY SUGGESTS SUM SAY GO WITH A 700R4 SUM SAY TRY TO GET THA 4L60E TO WORK I LIVE IN DETROIT AND I HAD TO PARK THA CAR LAST YEAR AROUND THIS TIME DUE TO FUNDS (23 AND IN COLLEGE) BUT I GOT THA MONEY NOW AND IM REDOING SUM STUFF TO GET IT READY FOR NEXT SUMMER SO ANY BODY WITH SUM HELPFUL WORDS WOULD BE GREAT