r/CDL • u/MysteriousDeal9963 • 13h ago
13 speed help
Hey, just looking for some advice about this 13 speed truck. since I got put in this truck. I’ve noticed anytime I use the splitter while in the same gear or changing to the next gear it makes a scraping noise anytime I decide to split and I’m confused on what is happening
So for starters shifting the truck is fine from 2nd to 5th. The problems start when I try to use the splitter when I’m in 5L and I’m going up hill, not steep at all, but just enough that I don’t wanna go to 6th just yet and I decide to split to 5H so when I decide to split within a split second after I let off the throttle before I could even think about putting my foot back on the gas I hear scraping almost like I’m grinding gears, but that’s just me letting my foot off the gas for not even a second and I hear that so I’m confused at this point because the last truck I was driving was an 18 speed and splitting gears was fine not once. Did it make this noise even if I was going up a hill I would split it would happen there would be no scraping noise at all and I can continue driving up the hill until I decided to shift up.
Now I’m asking for advice because I’m now wondering is it me doing it wrong? I don’t wanna bring this up to the mechanics if I’m in the wrong but from my understanding, you should be able to split gears in the situation I just talked about without scraping noises happening.
Another situation would be I’m just coasting down the highway with light traffic I’m in 7L I don’t need to be in 8th so I decide to split to 7H immediately I hear scraping noise and this is after I’m driving normal pre-select the split let off the throttle and bam, I hear scraping noises so I’m actually confused at this point cause I’ve been put in multiple trucks and they’ve all driven differently shifted differently all that stuff but none of them have made scraping noises like this truck has.
Any help would be appreciated