Taking off in 1st ???

What?

You start out in the lowest gear that does not lug the engine and doesn't burn up the clutch.

I hauled 60k die sets and never started out in low, that was only used when I had more than 80k on the deck. It was usually 2nd for most trucks, first for a couple of others.

 

Use 1 when loaded or 2 when empty or Low if loaded and starting on an uphill.

How fast does your truck go in the highest gear and at what rpm?

 

At 77,000 lbs I started in 2nd gear up a small hill at a light and stalled.

Oops

 

ill try 2nd if that don't work either 3rd or 4th till u find a even ground on the clutch and rpms it will click so got to play with it alittle bit

 

Ok so it's an average speed truck
The reason I ask is if you have a truck that only did 62 at 1500 rpm it is geared slower and has more pulling power in the low gears meaning you could start out in a higher gear as compared to a truck that will do 75 at 1500 with 2 more gears to go. The fast truck won't multiply the torque as much and would require a lower numerical gear to begin moving from a stop. The slower the truck the more torque multiplication you have. That's why the really heavy moves those trucks won't run a very high speed but they will move an enormous weight. And some bull haulers moving a not so extreme weight can gear their truck very fast. If you tried to use the heavy truck for the bull wagon you wouldn't get much speed, if you tried to use the bull truck for a super heavy haul it might not even get it to move. Or, more likely, when it needs to go over a mountain it will be unable to do it.

 

2nd in an 8/13/18, 3rd in a 10/15. You can get going in 5th without stalling with proper control, but you wouldn't want to. If you stall it, that's on you.