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Remanufactured GMC Terrain Transmissions 

  • Learn about common GMC Terraintransmission problems 
  • Everything you need to know when shopping for a GMC Terraintransmission for sale 
  • How and when to buy a remanufactured GMC Terraintransmission 

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Remanufactured GMC Terrain Transmissions 


Perhaps one of the most iconic American luxury crossovers, the GMC Terrain has been a favorite among luxury SUV shoppers for years. However, transmission problems with the 6T40 and 6T70 could easily cause it to fall out of favor. So let’s find out if installing a remanufactured GMC Terrain transmission could solve these problems. 


Common GMC Terrain 6T40 Transmission Problems  


No forward, no reverse, engine will not crank, engine will not start 

Problem – Some of the symptoms of this problem include; the transmission will not engage, the engine cranks but will not start, transmission fluid leaks, unusually harsh shifts, transmission slipping, certain transmission gears will not engage. These diagnostic trouble codes may also be present; P0776, P0796, P2714, P2723. 

Solution – These problems may be caused by low line pressure due to a damaged transmission pump. 


Common GMC Terrain 6T70 Transmission Problems  


One of the most common 6T70 transmission problems is overheating. This happens when the moving parts inside the transmission are creating more friction heat than the ATF can remove. The most common cause of this condition is towing heavy loads, driving in stop/go traffic, or on mountain roads where the transmission has to shift a lot. 


Overfilling the transmission with too much ATF can also cause 6T70 transmission overheating, which can lead to ruptured seals, and damaged torque converters, valve bodies, bands, and clutches. An auxiliary transmission cooler can do a lot to help keep the temperature down. 


You can also cause the transmission to overheat with improper maintenance or abuse. The main things you need to watch out for are overtowing and revving too much. These cause the transmission to rev too high and strip gears or use too much transmission fluid. The best thing to do, if you think the transmission is overheating, is to pull to the side of the road and let the vehicle cool down. 


When a gear change is required, the computer tells a little spring-loaded plunger in the valve body to move and direct pressurized ATF into the appropriate channel. Theres one of these solenoids for each gear, and its activated by sending current through the coil of wire thats wrapped around it. The problem is, that coil of wire can short out, or excessive vibration can shake it loose, causing the solenoid to fail. 


How to Solve GMC Terrain Transmission Problems 


Solution A: Buy a Used GMC Terrain Transmission 

Going to the local junkyard and picking up a used GMC Terrain transmission might seem like the cheapest and fastest option. But you need to consider the fact that you don’t know what the actual shape of the internal components are. It could very well be on the verge of transmission problems of its own, which would leave you in the exact same predicament that you’re in now. And that 30 – 90 day junkyard warranty probably won’t cover labor charges to install the replacement transmission if something goes wrong. 


Solution B: Buy a Rebuilt GMC Terrain Transmission  

Getting a rebuilt GMC Terrain transmission would probably seem like a better idea. However, a lot of mechanics and transmission shops will only rebuild your GMC Terrain transmission back to its original factory specifications. Which means that all of those factory design flaws are still going to be inplay. And that rebuilt transmission warranty might only be good at certain shops, which could do you no good if you have transmission problems while you’re traveling. 


Solution C: Buy a Remanufactured GMC Terrain Transmission  

If you want to get the most service life out of your little luxury SUV as possible, then you really should consider a remanufactured GMC Terrain transmission from Street Smart Transmission. Each one is completely disassembled and re-remanufactured, so nothing is left to chance. Theyre also modified to correct the factory design flaws, which will greatly extend the service life. Plus, you get a 3-Year/Unlimited Mile Nationwide Warranty. This will cover parts and labor charges at any licensed repair shop in the Continental United States, giving you a lot more flexibility and coverage.