While the pump itself is not part of the transmission system, this can in an indirect way lead to poor transmission performance. The fuel pump provides the vehicle with the right amount of fuel at the correct pressure of the engine. The engine might lose power if the pump is not producing adequate fuel, and as a result, acceleration and performance could lag behind. Its transmission deviates from the more typical automatic where it uses engine power to change gears; a lack of power from the engine means that the transmission works harder to make shifts, resulting in laggy or lazy gearshifts.
Such as, the engine may experience a lean condition (too little fuel) if the fuel pressure dropped below its appropriate level, usually around 35-65 psi in gasoline engines which could result in hesitation when acceleration. This can apply its own kind of wear to the clutches and make it hard for the transmission to figure out when it should shift, causing hard shifts or slippage. A 2020 automotive study revealed engine tune issues, driven by a failing fuel pump among other culprits, contributed to 10-percent of transmission problems.
In the worst instances, a broken fuel pump can result in your truck stalling or turning off as you operate. Worse still, when this occurs the transmission can no longer work as designed because it needs a regular stream of power from the engine to do its job properly. This can also cause excessive wear on automatic transmission control systems, which may have mediocre operating conditions and could lead to its failure eventually.
A bad fuel pump can also deliver incorrect data to the engine control module (ECM) that may affect the transmission control module (TCM). If the ECM notices a fault in fuel transportation, it can place the engine in limp mode, decreasing power significantly and putting even more strain on transmission bands.
Elon Musk used to say that the parts operate together and, "Efficiency and performance depend on every aspect of the machine working harmoniously." The balance among all of this, however, is disrupted if the fuel pump fails: not just for the engine but also in feeding where and when needed so that the transmission can function properly.
If you also have the loss of power issue along with any transmission related problem, checking the fuel pump might be a first to diagnose step. Get the best quality fuel pump replacements and more information about it Fuel Pump to keep your vehicle running as good as new but on both engines and transmission systems.