Let’s say you have a manual transmission and 1st and reverse are basically the same exact gear ratio. Let’s say the vehicle is parked with the front facing downhill. Is it best to have it in 1st gear or reverse? The reason I ask this is that I used to always park my vehicles in the gear opposite the direction the car is facing. If the front is pointed downhill, I would park it in reverse. If the back was facing downhill, I would put it in 1st. I recently had an experience that seems to indicate that it would be best to park it in the gear for the direction the car would roll.
I had one of my trucks fully loaded with firewood. It was really loaded up, probably overloaded. I parked it on a hill and put it in reverse. It began to roll forward once I turned it off before I could put the parking brake on. I know the clutch wasn’t slipping as I could feel the pulse of the engine turning over due to the compression. The clutch is also basically new and it was also a lot harder to start after this happened. I put the parking brake on and chocked the wheels with firewood so it wouldn’t roll.
I have done a few more experiments with this truck in similar situations. It seems that the truck is less likely to roll and overpower the compression of the engine when the truck is in 1st when it would want to roll forward or reverse when it would want to roll backwards. This is a Ford 4.6L. Does it make any sense?