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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

Air disc brake caliper/rotor lift/handler
04/02/2020 in the HD/Fleet Forum
I know this should be in the tool and equipment forum but it pertains only to heavy duty so here goes. With air disc brakes being more and more popular and my back getting older, I'm looking at buying one of the Gray manufacturing air disc brake rotor/hub...
no data link on M@ Freightliner
03/31/2020 in the HD/Fleet Forum
We have in our shop a 2014 Freightliner 114 SD vin is [...]. There is no 1939 data link. Truck was towed in to us with throttle going up and down randomly. The ELD is unplugged so it is not causing problem. Truck will not start now. There is voltage on th...
03/30/2020 in the HD/Fleet Forum
Anyone have a schematic for the SCR on this Volvo. I'm chasing an intermittent Dosing Valve code SPN5394/5 2011 Volvo VNM, D11 Eng [...].
1974 Dodge D500
03/25/2020 in the HD/Fleet Forum
We are looking for anyone that has a source for or a rebuilder for the brake booster for this truck. We believe this is the correct part-. Any help would be greatly appreciated as this is a little out of our normal wheel house.
Maxxforce DT oil pan
03/24/2020 in the HD/Fleet Forum
[Engine: 14 IC Corporation CE School Bus 7.6L] Good day to all, I'm replacing a rust damaged oil pan on a DT equipped Navistar school bus but have run into a problem. The pan is loose but there's not enough room to remove it as the sump hits the axle and...

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