The general rule of thumb is " you go down the mountain in the same gear you went up it in". For example, if you went up in fourth you will come down in fourth gear. I also leave the Jake on. Be careful to not ride the brakes on the way down or you may not have any at the bottom. If you feel you are going too fast drop down another gear. This will increase the RPM and cause the Jake to operate more effectively. The Jake's best performance is at 1800 RPM and above. Don't worry if you are holding up traffic, let them pass you if they can or stay behind you. Just worry about yourself reaching the bottom safely.

if you have to apply the brakes use the stab method. That is apply sufficient brake pressure to drop your speed 5 miles per hour and when it gains that 5 apply brakes again. I have not driven the road you will be on but I have found that with the proper gear and the Jake on I rarely have to apply the brakes going downhill.