Really big auto transmissions

[nat_ster]

I think this is the series of trans in that big coach I bumped back to the top.

http://www.allisontransmission.com/d...3.pdf?sfvrsn=2

They can only handle 2700 ft pounds of torque.

They can be found in big heavy powerful units like fire trucks, ect.

Nat

[family wagon]

Originally Posted by nat_ster

I think this is the series of trans in that big coach I bumped back to the top.

http://www.allisontransmission.com/d...3.pdf?sfvrsn=2

They can only handle 2700 ft pounds of torque.

They can be found in big heavy powerful units like fire trucks, ect.

What was the weight of that coach -- didn't the thread call it out a little over 40,000? This transmission is almost 6% of that vehicle's weight! (and that's not including the transmission oil..)

[nat_ster]

Originally Posted by family wagon

What was the weight of that coach -- didn't the thread call it out a little over 40,000? This transmission is almost 6% of that vehicle's weight! (and that's not including the transmission oil..)

Yup 3920 pounds of coach.

Nothing like a transmission that weighs over 2420 pounds.

Now we know why they need a tag axle.

Nat