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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.

Continue to the description of our next automotive discussion forum, the HVAC Forum.

Recent Automotive Discussions in the Automotive HD/Fleet Forum

10/22/2019 in the HD/Fleet Forum
[Engine: 12 International 7500 9.3L] I'm looking to see if anyone knows what size o-ring flat face seal fitting is used on the high pressure oil pump. I want to make a test fitting to pressurize the injectors and oil manifold. I want to be able to use th...
10/22/2019 in the HD/Fleet Forum
Hi. Looking for a Navistar truck or bus VIN with a T444E V8 aka 7.3 DIT Powerstroke and an Allison 2000 series trans. Need to look up some parts for a conversion. TIA.
drum brake to disc brake conversion
10/22/2019 in the HD/Fleet Forum
[Brakes: 50 Chevrolet Truck 3800 3.5L] Hi everyone i have a customer with a 1950 chevy 1 1/2 ton farm truck 5 lug set-up , he wants to do a front brake conversion from drum to disc. does anyone know of a company that can supply that kit , everyone i tal...
05 isuzu 5.2 crank no start
10/18/2019 in the HD/Fleet Forum
[Electrical: 05 Isuzu NPR 5.2L] this truck has a fresh rebuild trying to correct this issue, by a nother shop. 75 psi oil. knowen good fuel pump, new filters. changed cam and crank sensors with knowen good. no codes. actual fuel psi and dezired match 435...
2006 gmc w3500 5.2 Ecm Rebuild
10/17/2019 in the HD/Fleet Forum
Hello everybody. Wondering if anybody knows of any places that can rebuild an ECM for one of these units? Or what would be involved in programming a used one? Customer doesn't want to go with a new one due to cost so we are trying to explore other options...

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