Go to Preludeonline.com and read the first thread. This is commmon for your car, and you should prepare to either buy a remanufactured tranny or a new one because these SS trannies from 97-99 don't usually last past 100K unless you are very lucky. I replaced mine at 80K miles. There are hundreds of complaints against Honda and on the NTSB website. Honda finally corrected the problem in 2000 by issuing a safety recall for all 00-01 Preludes but excluded the previous models, because their accounting dept, having realized more Preludes were sold from 97-99 would have caused detrimental profit loss in the regard of transmission repairs. This is a very old story, and you should do your own research to better prepare yourself for some heartache, soon.