I'm going to change my tranny fluid, 24,000 miles, and the spin on filter. My distributor sent me TranSynd RD instead of just TranSynd. The TranSynd RD says it is for Rough Duty off-road service and carries the TES-353 rating. I am not sure if it's bettor than TranSynd for typical hiway towing use. Is anyone familiar with the TranSynd RD and is it better or not acceptable in our Allison's?