Transmission fluid works as a coolant and lubricant for the transmission's internal components. Gear slippage causes your vehicle not to accelerate properly. When the ATF is down, your NPR will not produce the required hydraulic pressure, which could lead to a problem called gear slippage.

Low transmission fluid levels are another severe issue that can cause the transmission light to start flashing. This will help you to fix the 'wrong ATF' error before it damages the entire transmission system. It is essential to keep record of the fluid you add to your transmission. When you use the wrong fluid, and it starts burning up the transmission, the computer system in your vehicle will sense the issue and illuminate the transmission warning light. If you mistakenly add the wrong ATF in your Isuzu NPR, it'll burn up the transmission system in a day or two. Although this silicone-based fluid is quite affordable, failure to use it could cause many problems for your truck. Why Isuzu NPR Transmission Light is flashing 1) Wrong or Low Transmission FluidĪll Isuzu NPR trucks manufactured in 2007 and later use one of the most inexpensive transmission fluids in the market. However, despite its solid engineering, the NPR Aisin automatic transmission has its fair share of failures.

Transmission light flashing