Auto & Diesel
Fleet truck, intermittent crank-no-start. Maybe once every ten days. Driver says it cranks normally and just does not catch, then twenty minutes later it starts fine. Two weeks of it sitting in my ba...
Fleet truck, 340,000 miles on the X15. Intermittent no-start, happens 1 in 20 attempts. Cranks fine but won't fire. Codes: P0340 (CMP sensor A, Bank 1, low input) and P0345 (CMP sensor A, Bank 2). R...
Independent transmission shop, four bays, three techs plus me. Raised the door rate from $138 to $163 in February. Parts margin unchanged. Lost two long-term fleet accounts over it. Kept everything e...
School question (sorry if this is basic). We're covering braking systems this week and the instructor talked about brake fade on descending grades. He said drum brakes are more prone to fade than disc...
Updated thoughts after using both for 6 months on our Freightliner, Kenworth, and Peterbilt fleet. We've got 47 Class 8 tractors and about 30 straight trucks. **JPRO Fleet (Noregon):** - Best coverag...
Running into more DEF system failures on the 2018-2021 Freightliner Cascadias in our fleet. Specifically SCR efficiency faults (SPN 3058, FMI 16/18) and dosing unit atomization issues. Current proces...
Posting this because it took me longer than it should have and the technique is worth sharing. 2017 Transit, intermittent loss of communication with the ABS and instrument cluster, U0121 and U0155 st...
Fleet Peterbilt 579 with Paccar MX-13. DPF light came on, driver attempted active regen per the procedure. Regen starts and runs for about 8 minutes then aborts with a "Regen Failed" message. No faul...
Customer came in with a 2017 Freightliner Cascadia DD15, complaining about oil consumption. Driver is adding a quart every 1,500 miles. Engine has 680,000 miles. No visible smoke, no coolant in oil, n...
2016 Peterbilt 389 with a Paccar MX-13. Came in with a crack in the exhaust manifold at cylinder 4 — classic stress crack right at the port flange. Owner had been nursing it for two months and the exh...
Trying to get better at giving customers a clear decision framework for transmission work. Right now I kind of wing it based on symptoms and mileage, which isn't great for customer communication. Wha...