Speed limiter 118 kph and harsh shifting

[Ben Jardine]

Heres the specs then the story 

2024 2500 hd 6.6 gas 4x4 crew cab 10 speed allison trucks bone stock has 27 000 km on it atm i bought it july 18 2023 

So other day i started my truck moved my 5th wheel in my yard then went to head into town . Truck was at temp as i had been using it around the yard . I jumped onto the road and rolled out and floored it around 25 kph and the truck stopped pulling at 118 and a messaged show up on my dash that said speed limiter set to 118 kph . I stopped the truck and it went away . Now fast forward to few days ago i was pulling a 5th wheel travel trailer that was 11000 pounds down the highway i pulled out to pass a car that wasnt maintaining highway speed i gave my truck 3/4 throttle ( i was driving 65 kph ) and it barked the back tires just like if you locked up the rear wheels . Felt like a old car with a extreme shift kit . Today as i was driving it it banged a few times hauling ruffly 8500 pounds in stop and go traffic like it was being slammed in gear as i was slowing down to the traffic lights . Anyone else experienced these issues before . 

Now in my personal opinion it seems electrical related . About 10 000 km ago my truck wouldnt stop dinging from Montreal quebec all way back to new brunswick until i unhooked my battier like a warning ding every 4 to 5 seconds 

Edited May 2, 2024 by Ben Jardine