98 GT40 prop spin or transmission

[Finnz]

Hello friends

I've got a 98 SN GT40 approx 550 hrs and had a problem this weekend. When I accelerated at heavy throttle the boat had an initial jump but the acceleration almost immediately declined but RPMS continued grow and I thought I could hear a spinning sound. If I accelerated very gradually I could get up to full speed without the problem occuring and it didn't seem to occur if I hit the throttle heavy at speeds greater than 25 mph. So no hole shot is the problem, which is a big problem for skiing. I was able to pull my 8 year old on kids skis but it did slip a little while pulling him up. Any thoughts and any suggestions for mechanic in okc? Tranny fluid appears to be full and fairly clean.

[j2nh]

Transmission. Do a fluid change just to be sure, two quarts if you get it all and try it again. Otherwise it needs service. Transmissions are pretty simple and repairs not bad.

[Tom_H]

Sounds like a slipping transmission. Other things you could check though are to make sure you haven't sheared a key at the prop or transmission coupling.

[Finnz]

Hello Friends thanks for the advice and tips. Do you have any experience in doing a rebuild in the PCM 40a tranismission?