Transmission issues are pretty common in semi-trucks despite it being a crucial component of the truck. However, there are a few warning signs that the semi starts to give off when these issues start to form. If you know what to look for, you will have a better chance of ensuring that your truck’s transmission stays in good shape. Before you can work on preventing transmission issues in your semi-truck, you need to know some of the most common semi-truck transmission problems that diesel engine trucks face.
Gear Issues
Semi-trucks commonly face problems with switching and staying in gear. If you notice that your truck’s gears are not engaging or taking a long time to get into gear, it may be due to low transmission fluid. Transmission slips, not being able to stay in gear, and high engine revving are common problems that occur due to low transmission fluid.
Leaks or contamination may be responsible for the low transmission fluid. You need to look at the dipstick levels to find out if you are dealing with low fluid. Check for leaks under the vehicle, and if you see red fluid, it means that there is a leakage.
Strange Noises
If you hear any strange buzzing, clunking, or grinding noises, it may be indicative of internal issues. Usually, bad seals or low transmission fluids result in strange humming and buzzing sounds. If you hear a grinding sound while shifting, it could be due to the clutch not releasing. Excessive wear and tear on internal components like the shifter, synchronizer rings, or even the gear itself may result in grinding sounds as well.
Clutch Pedal Issues
If there are any issues with the clutch pedal, it can result in it grabbing low or high. If the problem is with the hydraulic system, the pedal tends to grab very low. If it is an adjustment issue or its components like the pressure plate or clutch disc are worn out, the pedal grabs very high.
Transmission Slips and High Revving
Semi-trucks often experience transmission slips or high revving issues. This usually happens because of low transmission fluid and contamination. Poor maintenance and worn-down parts can also be a factor contributing to these problems.
No Power
If the vehicle’s engine is running but it is not receiving any power, it could be because of an engine problem. If the system detects any issues with the engine, it can limit power. Another reason that the vehicle may not be receiving power could be due to dragging brakes. You can look at the trouble codes to find out the source of the issue.
Its important that you know about these common transmission issues so when you are looking at used trucks for sale you are able to recognize them. Or if your truck is facing any of these issues you can get it the help it needs immediately. Catching these transmission issues early on will prevent them from turning into a bigger problem.