so its not really a tranny issue buta fluid issue...we have the same kind of problem with our race car, we change the fluid ever tripto the track...we started using some amsoil compressor oil and it seems to hold up much better but we still change it every race...i know ptc has recommended the hydraullic oil to us before also we just never tried it...as far as regular fluids we only had good luck with the lucas synthetic tranny fluid, it was the best that we ever tried for conventional fluid...what does your car make for torque?