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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

Protecting plugs from corrosion
05/22/2012 in the HD/Fleet Forum
I am busy rebuilding a water browser, built onto a CAT 740 ADT, and the wiring harness connectors have not stood up to the effects of being near water all of the time. This is even with all of the connectors, mostly Deutsch type, having all of their seals...
2000 Sterling, 40MPH bounce
05/22/2012 in the HD/Fleet Forum
[Electrical: 00 Sterling Sterling On-Highway 7.2L] I have a 2000 Sterling, [...], single axle county road commission truck, that has a bounce (not vibration) at 40mph. The engine is a 3126, [...] and a Allison HD transmission. It was sent to the CAT deal...
1989 Ford 7.3 Diesel Timing Cover
05/21/2012 in the HD/Fleet Forum
[Engine: 89 Ford F-350 XL 7.3L] The timing cover on this engine is badly erroded where the waterpump mounts. The tech working on it would really like to have a new cover. Both Ford and International show this cover to be obsolete. What are our options? T...
P0087 and limp-in mode pulling heavy uphill
05/21/2012 in the HD/Fleet Forum
[Driveability: 07 Chevrolet C4500 Kodiak C4C042 6.6L] Trying to learn more about the Duramax Diesel, this truck has an LLY engine. This came in at the beginning of the month, setting P0087 and going into limp-in mode, also smokes black on acceleration. T...
2000 Int 4900 stall, no crank
05/21/2012 in the HD/Fleet Forum
VIN [...] Hi, The engine had stalled and would not crank on the highway, one month ago. Made a service call. Noticed the voltmeter di not work. wiggled the wires at the ignition switch and it cranked and started. All was good for 2 weeks. Engine stalled a...