Welcome aboard Tommy. I'm not familiar with your unit, but I would spin the prop shaft with the engine off. If the pack is stuck you may be able to spin the engine slightly I suspect. The more likely scenario of a stuck disk is a warped disc/discs from excessive wear and overheating. There would be other indicators like burned oil and clutch material in the filter or suction screen. If none of this applies, then your control oil (forward and reverse pack pistons receive pressurized oil to squeeze the discs) would be suspect. It could be in the control valve (your cheapest repair) to internal bypassing, possibly at an oil distributor. Once you locate the specs and test ports for F/R for your unit you could diagnose further. Good luck. Keep us posted!
