[ACHiPo]

Well my 3550 TKO does not shift well. Not sure how it compares to the TKO600. I need to find out what tranny was in the ERA I drove a few weeks ago--it was fantastic with quick, very positive short shifts. It was built about 10 years ago so it could be a 600 or a 3550. I only hope my 600 shifts as well.