Transmission doesn't want to shift down into low when stopping quickly.

Hello, it will be necessary to monitor the commands given by the processor to the transmission to see if the downshift is desired. If it is, and it doesn't engage - then it's an internal transmission issue. If it does not command the downshift, you'll need to look at inputs to the processor to find out why. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops