KTA Cummins and transmission torque rating

spsauerland · Sep 6, 2021

badlandsbullhauler said: ↑

I currently run an 81 pete with a KTA600 and a 6x4. I can PROMISE you, the stock KTA600 produces WAY more than 1650 fl-lbs of torque. I can easily run with any 600-625 HP electronic engine. I haven't had mine on a dyno, but I would say it's putting down 2000 give or take. It is rumored that they bluffed the torque spec to keep the driveline warranty intact. The new QSK version is 650HP and 2300 ft-lb. Those numbers compared to 600/2000 for a mechanical version seems pretty reasonable to me.

As far as fuel economy is concerned, I consistently match the newer ISX powered trucks with all the emissions garbage. I give up 1/2 MPG US to the pre emission electronic engines and deleted ISXs. The fellas with the big power DD16s are getting about 1 MPG better than me and can keep up on short hills but I will eventually pull away on long pulls.

I've been running this truck 3 years now from coast to coast in Canada, down to PA, SC, MO, WY, CO, UT, OR and pretty much everywhere in between. I do a lot of work in the BC mountains at 102k lbs. The most noticeable benefit of the KTA is, compared to high hp small ci engines, they can keep up on short pulls, but in the big mountains, I will walk away from them when they run out of steam. Noting I've ever run or seen has the heart that a K does.
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Nice looking truck, glad to see older iron still working.

mile marker 27 · Sep 6, 2021

badlandsbullhauler said: ↑

I currently run an 81 pete with a KTA600 and a 6x4. I can PROMISE you, the stock KTA600 produces WAY more than 1650 fl-lbs of torque. I can easily run with any 600-625 HP electronic engine. I haven't had mine on a dyno, but I would say it's putting down 2000 give or take. It is rumored that they bluffed the torque spec to keep the driveline warranty intact. The new QSK version is 650HP and 2300 ft-lb. Those numbers compared to 600/2000 for a mechanical version seems pretty reasonable to me.

As far as fuel economy is concerned, I consistently match the newer ISX powered trucks with all the emissions garbage. I give up 1/2 MPG US to the pre emission electronic engines and deleted ISXs. The fellas with the big power DD16s are getting about 1 MPG better than me and can keep up on short hills but I will eventually pull away on long pulls.

I've been running this truck 3 years now from coast to coast in Canada, down to PA, SC, MO, WY, CO, UT, OR and pretty much everywhere in between. I do a lot of work in the BC mountains at 102k lbs. The most noticeable benefit of the KTA is, compared to high hp small ci engines, they can keep up on short pulls, but in the big mountains, I will walk away from them when they run out of steam. Noting I've ever run or seen has the heart that a K does.
Click to expand...

What’s the torque rating on you 6x4 spicer? Any idea what torque rating on a 13 speed, is needed?

badlandsbullhauler · Sep 6, 2021

mile marker 27 said: ↑

What’s the torque rating on you 6x4 spicer? Any idea what torque rating on a 13 speed, is needed?
Click to expand...

I believe the main was rated at around 1,400ft-lb and the auxiliary was 12,000ft-lb. I've never run a 13 so I know little about them. In Canada we generally stick to 18s... at least in the circles I run.

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