Hopefully someone can help, I have a '94 ram 1500 with a NV-3500 5-speed Manual Transmission. I am wanting to change my fluids and need to go buy a allen to remove the drain and fill plugs on my transmission. Can anyone tell me what size allen wrench I need before I go out to the store. It is raining out so I really don't want to have to get under the truck in front of the store to see which wrench fits...thx