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Remanufactured Pontiac G8 Transmissions 

  • Learn about common Pontiac G8transmission problems 
  • Everything you need to know when shopping for a Pontiac G8transmission for sale 
  • How and when to buy a remanufactured Pontiac G8transmission 

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Remanufactured Pontiac G8 Transmissions 


In case you didn’t already know, the Pontiac G8 is actually a rebadged topspec Holden Commodore that hails from the land down under. It’s a hilariously fun car, with enough power to put a smile on anyone’s face. However G8 transmission problems with the 5L40E or 6L80 can quickly turn that smile into a frown. So let’s see if installing a remanufactured Pontiac G8 transmission can turn your frown upside down. 


Common Pontiac G8 5L40E Transmission Problems  


Slipping, Erratic Shifting, Harsh Forward or Reverse Gear Engagement: Some of the most common 5L40E transmission problems are slipping between gears, erratic up or down shifts, or a hard slam when the 5L40E transmission engages Drive or Reverse. There are a number of design flaws in this transmission, and any one of them could be causing these symptoms. 

Another common problem 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. 


Common Pontiac G8 6L80 Transmission Problems  


Flare and/or harsh 2-3 shifts 

Problem  Some drivers can experience an unusually harsh 2-3 shift or flare. They may also experience an usual delay when shifting from Park, Drive and/or Reverse. The symptoms are more likely to happen in colder climates, however they can still happen at any temperature. 

Solution – These 6L80 transmission problems can be caused by a leaking 1-2-3-4 and 3-5-R clutch seal rings. The clutch packs, discs and drums should also be inspected for signs of damage. Street Smart Transmission remanufactured 6L80 transmissions come already modified to correct the causes of these problems. 

Slips in Reverse or Third, Delayed Reverse or Drive Engagement, DTC P0776, P2715, P2723, Harsh 2-3 Shifts  

Problem – Vehicles equipped with the 6L80 or 6L90 transmission may slip when Reverse is selected or have no/delayed reverse engagement, harsh shifts from 2-3 / 4-5 or slips while in fifth, and slipping acceleration when passing. Possible DTCs include P0776, P2715 or P2723. 

Solution – This transmission problem may be caused by a cracked 1-2-3-4 / 3-5-R clutch housing 


How to Solve Pontiac G8 Transmission Problems 


Solution A: Buy a Used Pontiac G8 Transmission  

Going to the local junkyard and picking up a used Pontiac G8 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 Pontiac G8 Transmission  

Getting a rebuilt Pontiac G8 transmission would probably seem like a better idea. However, a lot of mechanics and transmission shops will only rebuild your Pontiac G8 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 Pontiac G8 Transmission  

If you want to get the most service life out of your vehicle as possible, then you really should consider a remanufactured Pontiac G8 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.