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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

Help Ultra Shift Plus
03/20/2023 in the HD/Fleet Forum
[Transmission: 16 Kenworth T880 11.9L] I am having some issues and looking for some guidance. SPN 560 FMI 11 Does not come out of gear Long story short…. I replaced the XY Shifter and harness to the shifter from the TCM. #1 -- Does this TCM need to...
2022 Isuzu NQR scan tool info
03/13/2023 in the HD/Fleet Forum
We have a new customer with a 2022 NQR, 6.0 gas engine, VIN [...]. We only found the round green diagnostic connector. Does it have an OBD II connector, if so, where is it located? Do we have to get the Isuzu software to be able to communicate with the ve...
topdon scaner
03/10/2023 in the HD/Fleet Forum
Has any one used their hd truck scanner. We do mostly light and medium duty with a few class 8s. This means we need both a light duty scanner and a hd scanner. Due to a 3 month wait to get one repaired.I think we need a back up scanner. We have factory to...
Coolant pressurizing
03/09/2023 in the HD/Fleet Forum
[Engine: 12 Ram 2500 SLT 6.7L] Group, Trying to help another shop with this one, ESN [...]. They got this truck in their shop for "pushing coolant from de-gas bottle" proceeded to replace the head gasket. Had the cyl head tested and re manned by a reputa...
Sterling Wire
03/01/2023 in the HD/Fleet Forum
[Electrical: 00 Sterling Truck AT9500 14.6L] 2000 Sterling AT9500 with a Cummins N14. The plastic dash was all broken up. We got a replacement dash and after installing it im hooking all the wiring back up. Unfortunately all the paint spots i marked them...

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