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Remanufactured GMC W4500 Transmissions 

  • Learn about common GMC W4500transmission problems 
  • Everything you need to know when shopping for a GMC W4500transmission for sale 
  • How and when to buy a remanufactured GMC W4500transmission 

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Remanufactured GMC W4500 Transmissions 


The GMC W4500 is a extremely recognizable site on many job sites. However, transmission problems with the 4L80E can leave it sidelined. So let’s find out if installing a remanufactured GMC W4500 transmission can help you get back to work. 


Common GMC W4500 4L80 Transmission Problems  


Erratic Shifting 

Since this was an early electronically controlled transmission, many shift problems/Check Engine Lights can be attributed to a failed input/output speed sensor, or throttle position sensor. 


Slipping Between Gears/Failure to Shift 

The 4L80E uses a total of 8 solenoids to actuate gear changes, and activate the lockup torque converter. These little plungers are used to control the ATF fluid pressure, and theyre activated by an electric charge that passes through a coil of wire thats wrapped around the plunger mechanism. If excessive vibrations or an electrical surge causes the solenoid to short out, youll start to experience serious problems. 



The primary function of automatic transmission fluid is to remove heat from the moving parts inside. If youre towing/hauling a heavy load and the radiator cooler cant properly cool the ATF, the transmission will overheat, causing significant damage to the valve body, seals, clutches, bands, and other parts. 


How to Solve GMC W4500 Transmission Problems 


Solution A: Buy a Used GMC W4500 Transmission  

Going to the local junkyard and picking up a used GMC W4500 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 W4500 Transmission  

Getting a rebuilt GMC W4500 transmission would probably seem like a better idea. However, a lot of mechanics and transmission shops will only rebuild your GMC W4500 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 W4500 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 W4500 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.