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Automotive HD/Fleet Forum

Professional automotive forum for discussion of heavy-duty trucks, buses and other on- and off-road equipment, and maintenance of automotive fleet vehicles. Discussion topics include fuels and lubricants, hydraulics, performance, on-board diagnostics, powertrain, power distribution, anti-lock braking and stability control systems, and best practices as they relate to heavy duty and fleet maintenance. This forum is for experienced automotive repair professionals only, membership required.

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Recent Automotive Discussions in the Automotive HD/Fleet Forum

2010 Isuzu NPR trany not shifting
10/30/2020 in the HD/Fleet Forum
This one is fixed but was such and odd duck that I am posting it for others. This truck came in trany not shifting code for solenoid stuck dont have code handy but was caused by customer installed back up lights . He had backed in to something and shorted...
Oil into my fuel Racor filter and oil consumption
10/29/2020 in the HD/Fleet Forum
Hi im new here, and have some issue in my International whit a ISX cummins 475,oil consumption and oil in the fuel, some mechanic here in Ecuador South America told me it is the high pressure pump after he scan the engine, but im not sure, can you help me...
Funky Air Pressure Gauge
10/29/2020 in the HD/Fleet Forum
[Brakes: 08 International 4300 7.6L] Truck has been a couple other places and I know they replaced the gauges but don't know what else. Secondary air gauge works correctly. Primary gauge with key off the gauge is at 0psi (has air in system)and the warnin...
Allison Transmission faults
10/27/2020 in the HD/Fleet Forum
My class has taken on the challenge of fixing a transmission for the school. It is an Allison 2000 series that has the following faults. Accessed through Noregon, I have P0732, P0841, P0843, and P0875, all inactive. They said that the transmission was stu...
DD15 Injector Cups
10/26/2020 in the HD/Fleet Forum
[Engine: 17 Freightliner Cascadia 113 11.9L] I would like to know if it is possible to install all 6 injector cups with engine in frame. It looks like you may not be able to remove the back 2 cups and o-rings due to space restrictions. Any advice would b...

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