3:42 rears

Because you posted this in the heavy haul forum...

How big of a load are you looking to pull? Tell me about the net weight of your truck. You posted this in the heavy haul forum. I would expect for you to be on a minimum of 8 axles. Minimum. Thing is, if you were on 8 axles, you would not be conversing about 3.42 rears. 3.90:1 would be the bare minimum for heavy haul. Regardless of transmission.

 

Nobody has answered yet.

 

Cat SDP #22, BeastR123 #25, CrudeTruckin' #29, BrettJ3876. #30
These posts and others I missed, have collectively explained it well.
Connect the dots.

 

YUP. It's just a ''number'' pulled'' outta the sky.
NOT.
Final drive and gear ratio are not the same thing and do not equal the same thing.
Just the REALITY of the situation.
Sorry.
Where does the number 3.42 come from?
I'll give you a hint, properly written it's 3.42-1.

 

Here is a rhetorical ?
Why don't y'all just have a direct drive and just change to a shorter tire to give more power.

 

Unsubscribed

 

Spin the axle with x amount of torque, put a 2ft bar on the end and try to hold it. Spin it again with the same torque but a 4ft bar on the end. You'll have twice the ability to hold that torque. You either truly don't understand the concept or you're trying to backpedal by arguing semantics with everyone here.

 

OK, but I'm not trying to ''hold'' the torque. I think it is you who has it backwards.
Take your bar and keep it from moving and measure the torque put on the bar. Tire size won't change that number. Gear ratio will.
Can you answer what the numbers mean.
I believe what I say. Not arguing to argue.
When I have some time I'll try to explain it.

 

The gear ratio expresses the ratio of the output torque to the input torque. Thus, we can multiply the torque supplied at the motor shaft (the input) by the gear ratio to find the torque at the wheel axle (the output). Transmitting power through a series of gears can also affect rotational speed.

Does a higher gear ratio mean more torque?
A numerically higher axle ratio provides a mechanical advantage to send more of the engine's available torque to the rear tires (and front tires, in a four-wheel drive vehicle), but you pay the price at the fuel pump. So, a truck with optional 3.73 gears will tow a heavier trailer than one with 3.55 or 3.21.

The gear ratio expresses the ratio of the output torque to the input torque. Thus, we can multiply the torque supplied at the motor shaft (the input) by the gear ratio to find the torque at the wheel axle (the output). Transmitting power through a series of gears can also affect rotational speed.

What gear gives the most torque?
In general, the lower the gear, the more torque can potentially be produced. In most vehicles, reverse is a “lower” gear than first and so can potentially deliver more torque.

What is the relationship between wheel size and output torque from an axle?
2 Answers



Peter Mills
, Aspiring musician and scientist (2011-present)
Answered June 20, 2017 · Author has 2.3K answers and 1.9M answer views

Originally Answered: What is the relationship between wheel size and output torque from a motor axle?
There is none. The whole point of torque is that it’s independent of the lever length. We calculate torque as follows:

 

I'm outta here.