I just bought a '96 STX38 with 5 speed gear tranny from a lady down the road from me for $150 last week. She had said it was occasionally having problems going forward at times, so I mowed with it for a few minutes and didn't have any problem so I bought it anyway figuring for $150 I'd take a chance. Well I mowed with it today and after about 10 minutes, sure enough it lost power and finally got where it would barely creep forward. Now logically in my mind I'm thinking it's the drive belt that may be worn out where it's tight enough to run the tranny when cold but when it heats up it loosens and won't drive the tranny anymore. Does that make sense to those perhaps more in the know that me? I looked at it and it's not frayed or anything but it looks pretty old and dried out.