Cat 3406 B RPMS / shifting

Double walk the button. In stead of preselecting the high to low split leave it in od move to the next gear before getting on the throttle move spltter to direct then get on the throttle. Let off go to od get back on it

 

Your losing torque/rpm but it does work.

 

All this for a 13 speed. Come on it's a great transmission. One gear is same as another unless you have Under drive and over drive in the top. If you do, then your fuel pedal determines it's use. It's a extra half gear under before physically shifting down.

The more you drive the less RPM you need to shift say 1300 to 1500. Eventually you will learn to cross gears without the use of the clutch. click click click. Useful for when clutches decide to go out.

 

Anything below 1200 is lugging on a c15, anything below 1300 on a 3406b is lugging, anything below 1400 on a 3406c is lugging, 1000 to 1500 is a CDL school fairytale that shouldn't be used when loaded, load on the engine affects fuel economy, rpms affect fuel economy at idle and cruising, you could pulling at 1200 or 1700 the pulse width changes for the injectors on electronic injectors

 

7 years.....

Nice, but i don't believe ya

 

Then you've probably never been a mechanic who has rebuilt many many cat engines, if you knew what lugging means you'd understand that running under full load below peak torque is lugging your engine, creates excessive carbon build up, hot spots on cylinder liners, cylinder glazing, destroys injector seals, internal vibration wears out bearings faster, carbon build up in turbo housing, why would you make the engine struggle and cause more wear for what? You're not saving anything in fuel that way hate to say it

 

You got me there. I pretty much changed fuel filters and tires. I only get to learn golden info like you posted at the local truckstop diner.

I have aired up many many tires though, so hit me up when you need help there

 

Then you’ve never been around a B model CAT. 1300 won’t cut it. Peak torque is 1475 rpm on most truck applications. Same with a C model 1475 on most truck applications. The industrial C models some will hit peak torque at 1350. You pull a sure enough B down to 1300 all the time you’ll kill it. The C will take it a little better due to having a smaller wastegated exhaust housing on the turbo and it lighting a bit sooner. The C also runs higher nozzle pop pressures, better atomization and isn’t so bad to wash down a cylinder or create the hot spots in a cylinder a B will from the bigger droplets of fuel burning. The only similarity between a mechanical CAT whether it’s a PEEC or true mechanical fuel system and an E or pre Acert C15 is the 893 cubic in displacement.

 

I look forward to a rebuttal while smiling. Imma go air up some tires in the meantime

 

Gotta watch the egt temps