Transmission and auxiliary transmission

That’s the whole point of a sb axle. To shorten wb for better turning radius and wgt distribution

 

Wheelbase is measured from the center of the steer axle to the center of the rear bogie, what does how far the hood sticks out past the steer have to do with wheelbase?

 

Yes but 228” is 228” regardless of cab/hood position.

 

Technically a setback axle tractor with the same wheelbase as a set forward has a longer bumper to bumper length.

 

it Doesn’t. That’s what I said. A sb has a shorter wheelbase. But the engine and trans are in the same spot as a sf. This drive angles and length will be the same, but wb is shorter

 

Exactly a 228 wb with a sb would be close to a 248 with a sf. So you can’t go purely off of wb.

 

No the wheelbase does not change based on cab/hood position.

 

228 is 228 regardless of hood position.

 

Here’s two schematics of the same model truck, both have 115.9” BBC of length, the only difference it the position of the cab on the frame. Engine placement has nothing to do with wheelbase. You measure wheelbase from the center of the steer axle to the center of the bogie. Tell me how a truck that’s 228” from the center of the axle to the center of the bogie has a different wheelbase because of can position?

 

Huh? No one said it does.
Let’s go back to the beginning. You said a spicer rep said the do not recommend an aux on a short wheelbase. Correct? Then others came on saying they have less than 250” wb. with an aux. I simply want to know if they have a set back front axle or set forward.
If you take two identical trucks, and only change the front axle position. You will have one with a shorter wheelbase. Driveline angles will be the same. So when the rep said you can’t do it on a short wb he wasn’t entirely correct. You need a certain amount of distance on the driveshaft to have a gradual enough fall as to not bind. I wasn’t attacking you, if that’s how it came off