Welp! Today got interesting!

[Chris142]

I got pulled out of the shop to haul some cement blocks. Got 605 hp and 18 gears!

 

[Chris142]

I will get this mastered today!

 

[gman2304]

How do you get 18 gears out of a Eaton/Fuller 8 speed? Unless there’s a splitter button I can’t see? Is the engine a X15 Cummins?

 

[oggb]

How do you get 18 gears out of a Eaton/Fuller 8 speed? Unless there’s a splitter button I can’t see? Is the engine a X15 Cummins?

There is a splitter and every gear can be split including Lo

 

[Chris Meutsch]

This would be me sitting in that cab......

 

[wpod]

Do you need to split the low range?

 

[BMWTurboDzl]

 

[Chris142]

Do you need to split the low range?

Not with normal loads. Thing came up cajon pass (6% grade) 55 mph in 17th gear @ 80000lbs.

 

[Chris142]

How do you get 18 gears out of a Eaton/Fuller 8 speed? Unless there’s a splitter button I can’t see? Is the engine a X15 Cummins?

Ya splitter on the left,range selector on the front .x15-605hp and 4:11 gears

 

[Chris142]

Cummins tag

 

[bullwinkle]

I can imagine "LO" with low spitter engaged-time to pull out some trees!

 

[wpod]

Decades ago Cummins made some huge engine I think is was called the KTA That was offered in 450 or 600 HP . I drove the 450 horse power one for 3 days it was something I remembered. The power was scary compared to the 350 hp Cummins etc of the time.

 

[Chris142]

Decades ago Cummins made some huge engine I think is was called the KTA That was offered in 450 or 600 HP . I drove the 450 horse power one for 3 days it was something I remembered. The power was scary compared to the 350 hp Cummins etc of the time.

1150 cuin iirc

 

[Chris142]

I can imagine "LO" with low spitter engaged-time to pull out some trees!

Ya this does not need all these gears. I am driving it like an 8 speed then splitting the top gear.

 

[Danno]

I used to spec our highway tractors, last batch were 2015 Volvos with the 13 L, 425hp, 1650 ft lb of torque, iShift transmission.
100 tractors in the fleet.
We would run 2 x 53' trailers, up to 146000 lbs GCVW, with that spec. Handled the weight fine. Could it go 60 mph up a 6% grade, no, but that's not what hauling commercial is about.
Imo.

 

[Chris142]

I used to spec our highway tractors, last batch were 2015 Volvos with the 13 L, 425hp, 1650 ft lb of torque, iShift transmission.
100 tractors in the fleet.
We would run 2 x 53' trailers, up to 146000 lbs GCVW, with that spec. Handled the weight fine. Could it go 60 mph up a 6% grade, no, but that's not what hauling commercial is about.
Imo.

These guys only have this one tractor. It's a heavy haul and is mainly used for hauling huge machines on trailers with many wheels.

It's so heavy that with a regular trailer we can only put 40k lbs on it.

Tonight I got stuck in a freeway closure for 5 hrs and could not move.

 

[tnt_motorsports]

How do you get 18 gears out of a Eaton/Fuller 8 speed? Unless there’s a splitter button I can’t see? Is the engine a X15 Cummins?

FWIW. there a re lot's of YouTube videos out there showing how to shift an 18 speed E/F transmission. Most drivers don't use Lo, and most don't split the bottom gears, just the top.

Just my $0.02

 

[BeerCan]

When I drove for a living I hated the tractor with the 18 speed. Much prefered the 10 speed.

Well that's my contribution

 

[Jarlaxle]

I used to spec our highway tractors, last batch were 2015 Volvos with the 13 L, 425hp, 1650 ft lb of torque, iShift transmission.
100 tractors in the fleet.
We would run 2 x 53' trailers, up to 146000 lbs GCVW, with that spec. Handled the weight fine. Could it go 60 mph up a 6% grade, no, but that's not what hauling commercial is about.
Imo.

We have a Volvo at work, single axle with a 405HP D13 and autoshift. It's horrible. The transmission programmer should be shot for incompetence. The driver has zero control, and the trans lugs the engine horribly.

 

[Danno]

We have a Volvo at work, single axle with a 405HP D13 and autoshift. It's horrible. The transmission programmer should be shot for incompetence. The driver has zero control, and the trans lugs the engine horribly.

Had similar concerns with the driver pool that had and International Prostar Cummins ISX and 10 speeds, going to a Volvo D13 with iShift.
There is a manual over ride option available on the iShift. It's a spec thing.
Also, the newer Class 8 engines are designed for peak torque at 1000 - 1200 RPMs.
Totally different than the 1500 - 1800 rpm of past.

Helping the drivers understand and use the newest truck technology was interesting.