Ram ProMaster 1500 transmission failure with inability to engage reverse after replacement on Ram ProMaster 1500

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Ram ProMaster 1500 owners report experiencing transmission issues, such as the inability to engage reverse even after a replacement. These problems can manifest as slipping, where the transmission fails to engage properly, resulting in delays in acceleration or a loss of power. Additionally, some owners find that their transmission may not shift correctly, getting stuck in one gear or struggling to engage reverse. Issues with the reverse gear could suggest problems with the reverse piston seal or other components affecting gear engagement. If there were initial problems with reversing prior to the transmission replacement, it may indicate underlying issues that were not fully resolved. It is crucial for owners to ensure that the replacement transmission is installed correctly and that all components, including the shifter cable, are functioning properly to prevent further complications. A thorough inspection by a qualified mechanic may be necessary to diagnose and address these issues effectively.

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