This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.
So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.
While negotiating steep grades (over 8 degrees) at moderate speeds (~30mph) with the engine brake in automatic a 3rd gear to 2nd gear or 2nd gear to first gear change is proceeded by a significant acceleration by as much as 5mph or more this can be simulated on less steep inclines by engaging the engine brake and manually shifting from 3rd to 2nd.. there will be an increase in speed that can be quite significant there is a minor reduction in braking when the truck performs a 4th to 3rd downshift but it doesn't cause acceleration to the degree that the 3rd and 2nd shifts do. The circumstances under which an engine brake would be used are exactly those circumstances where an unintended acceleration of any kind is most dangerous, such as mountain roads and switchbacks while towing heavy loads the dealer is aware of how to reproduce this event and has seen it first hand while on a test drive.
Shifting from 2 to 3rd gear while lightly accelerating, it bangs so hard I think transmission fell out. If it under aggressive acceleration, it's smooth
- Mandeville, LA, USA
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- Cool, CA, USA