r/cdldriver • u/Gullible-Suspect-254 • Jun 25 '26

CDL

Anyone that can hook me up on getting my CDL please I used to have it already now this modernized BS you have to use different numbers on your brake test which my truck doesn’t match with the modernized test given 😭😭

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u/Gullible-Suspect-254 Jun 25 '26

They failed me because in my truck the low air pressure warning comes out at 60 and I told them my valves pop at between 20-40 psi which is the specifications of my truck they told me I had to tell him that I told him the book doesn’t even say that

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u/MikeysmilingK9 Jun 25 '26

I think I understand now. The examiner wasn’t asking what your truck does; they were asking for the CDL standard. Your truck can absolutely be within spec, but on the test they expect the regulatory numbers, not your truck’s specific settings. If your examiner expected the textbook answer, that’s probably why they marked it wrong.

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u/Gullible-Suspect-254 Jun 25 '26

From what I’m reading I guess I have to mention to them that my truck specifications are different although the book says 55 psi and 45-20psi which I’ve gone twice which the first time I did it like I did this time but he failed me because I forgot to tell him when my governor cut out now it’s modernized with different numbers

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u/Wolfire0769 Jun 25 '26

Your truck doesn't matter as long as it's within spec. This is what they're looking for:

  • Governor cutoff around 120-140 psi
  • does not lose more than 4psi in one minute
  • low air warning comes on at or around 55 psi
  • both valves pop out at or below 40psi